bgcolour	#A0FFA0
name	Pluto
symbol
discovery	yes
discoverer	Clyde W. Tombaugh
discovered	February 18, 1930
mp name	134340 Pluto
named after	Pluto
mp category	dwarf planet,TNO,plutoid,KBO,plutino
epoch	J2000
aphelion	7,311,000,000 km48.871 AU
perihelion	4,437,000,000 km29.657 AU(1989 Sep 05)
semimajor	5,874,000,000 km39.264 AU
eccentricity	0.248 807 66
inclination	17.141 75°11.88° to Sun's equator
asc node	110.303 47°
arg peri	113.763 29°
period	90,613.305 days248.09 years14,164.4 Pluto solar days
synodic period	366.73 days
avg speed	4.666 km/s
mean anomaly	14.86012204°
satellites	4
physical characteristics	yes
mean radius	(0.18 Earths)1161 km (solid)
surface area	1.665 km20.033 Earths
volume	6.39 km30.0059  Earths
mass	(1.305 ± 0.007) kg0.00218 Earths0.178 Moons
density	2.03 ± 0.06 g/cm3
surface grav	m/s20.067 g
escape velocity	km/s
sidereal day	−6.387 230 day6 d 9 h 17 m 36 s
rot velocity	47.18 km/h
axial tilt	119.591 ± 0.014° (to orbit)
right asc north pole	312.993°
declination	6.163°
albedo	0.49–0.66 (geometric, varies by 35%)
magnitude	13.65 to 16.3(mean is 15.1)
abs magnitude	−0.7
angular size	0.065" to 0.115"
pronounce	,
adjectives	Plutonian
atmosphere	yes
temperatures	yes
temp name1	Kelvin
min temp 1	33 K
mean temp 1	44 K
max temp 1	55 K
surface pressure	0.30 Pa (summer maximum)
atmosphere composition	nitrogen, methane, carbon monoxide
note	no }}

Pluto, formal designation 134340 Pluto, is the second-most-massive known dwarf planet in the Solar System (after Eris) and the tenth-most-massive body observed directly orbiting the Sun. Originally classified as the ninth planet from the Sun, Pluto was recategorized due to recent discoveries and is now considered the largest dwarf planet within the newly charted Kuiper belt.

Like other members of the Kuiper belt, Pluto is composed primarily of rock and ice and is relatively small: approximately a fifth the mass of the Earth's Moon and a third its volume. It has an eccentric and highly inclined orbit that takes it from 30 to 49 AU (4.4–7.4 billion km) from the Sun. This causes Pluto to periodically come closer to the Sun than Neptune. As of 2011, it is 32.1 AU from the Sun.

From its discovery in 1930 until 2006, Pluto was classified as a planet. In the late 1970s, following the discovery of minor planet 2060 Chiron in the outer Solar System and the recognition of Pluto's relatively low mass, its status as a major planet began to be questioned. In the late 20th and early 21st century, many objects similar to Pluto were discovered in the outer Solar System, notably the scattered disc object Eris in 2005, which is 27% more massive than Pluto. On August 24, 2006, the International Astronomical Union (IAU) defined what it means to be a "planet" within the Solar System. This definition excluded Pluto as a planet and added it as a member of the new category "dwarf planet" along with Eris and Ceres. After the reclassification, Pluto was added to the list of minor planets and given the number 134340. A number of scientists continue to hold that Pluto should be classified as a planet.

Pluto has four known moons, the largest being Charon, along with Nix and Hydra, discovered in 2005, and the provisionally named S/2011 P 1, discovered in 2011. Pluto and Charon are sometimes described as a binary system because the barycenter of their orbits does not lie within either body. The IAU has yet to formalise a definition for binary dwarf planets, and as such officially classifies Charon as a moon of Pluto.

Discovery

In the 1840s, using Newtonian mechanics, Urbain Le Verrier predicted the position of the then-undiscovered planet Neptune after analysing perturbations in the orbit of Uranus. Subsequent observations of Neptune in the late 19th century caused astronomers to speculate that Uranus' orbit was being disturbed by another planet besides Neptune. In 1906, Percival Lowell, a wealthy Bostonian who had founded the Lowell Observatory in Flagstaff, Arizona in 1894, started an extensive project in search of a possible ninth planet, which he termed "Planet X". By 1909, Lowell and William H. Pickering had suggested several possible celestial coordinates for such a planet. Lowell and his observatory conducted his search until his death in 1916, but to no avail. Unknown to Lowell, on March 19, 1915, his observatory had captured two faint images of Pluto, but did not recognise them for what they were. Lowell was not the first to unknowingly photograph Pluto. There are sixteen known pre-discoveries, with the oldest being made by the Yerkes Observatory on August 20, 1909.

Due to a ten-year legal battle with Constance Lowell, Percival's widow, who attempted to wrest the observatory's million-dollar portion of his legacy for herself, the search for Planet X did not resume until 1929, when its director, Vesto Melvin Slipher, summarily handed the job of locating Planet X to Clyde Tombaugh, a 23-year-old Kansas man who had just arrived at the Lowell Observatory after Slipher had been impressed by a sample of his astronomical drawings.

Tombaugh's task was to systematically image the night sky in pairs of photographs taken two weeks apart, then examine each pair and determine whether any objects had shifted position. Using a machine called a blink comparator, he rapidly shifted back and forth between views of each of the plates to create the illusion of movement of any objects that had changed position or appearance between photographs. On February 18, 1930, after nearly a year of searching, Tombaugh discovered a possible moving object on photographic plates taken on January 23 and January 29 of that year. A lesser-quality photograph taken on January 21 helped confirm the movement. After the observatory obtained further confirmatory photographs, news of the discovery was telegraphed to the Harvard College Observatory on March 13, 1930.

Name

The discovery made headlines across the globe. The Lowell Observatory, which had the right to name the new object, received over 1000 suggestions from all over the world, ranging from Atlas to Zymal. Tombaugh urged Slipher to suggest a name for the new object quickly before someone else did. Constance Lowell proposed ''Zeus'', then ''Percival'' and finally ''Constance''. These suggestions were disregarded.

The name Pluto was proposed by Venetia Burney (1918–2009), an eleven-year-old schoolgirl in Oxford, England. Venetia was interested in classical mythology as well as astronomy, and considered the name, a name for the god of the underworld, appropriate for such a presumably dark and cold world. She suggested it in a conversation with her grandfather Falconer Madan, a former librarian at the University of Oxford's Bodleian Library. Madan passed the name to Professor Herbert Hall Turner, who then cabled it to colleagues in the United States.

The object was officially named on March 24, 1930. Each member of the Lowell Observatory was allowed to vote on a short-list of three: Minerva (which was already the name for an asteroid), Cronus (which had lost reputation through being proposed by the unpopular astronomer Thomas Jefferson Jackson See), and Pluto. Pluto received every vote. The name was announced on May 1, 1930. Upon the announcement, Madan gave Venetia five pounds (£5) (£|r=0}}}} as of ), as a reward.

It has been noted that the first two letters of ''Pluto'' are the initials of Percival Lowell, and Pluto's astronomical symbol (20px|) is a monogram constructed from the letters 'PL'. Pluto's astrological symbol resembles that of Neptune (20px), but has a circle in place of the middle prong of the trident (20px).

The name was soon embraced by wider culture. In 1930, Walt Disney introduced for Mickey Mouse a canine companion, named Pluto apparently in the object's honour, although Disney animator Ben Sharpsteen could not confirm why the name was given. In 1941, Glenn T. Seaborg named the newly created element plutonium after Pluto, in keeping with the tradition of naming elements after newly discovered planets, following uranium, which was named after Uranus, and neptunium, which was named after Neptune.

In Chinese, Japanese and Korean the name was translated as ''underworld king star'' (冥王星), as suggested by Houei Nojiri in 1930. Many other non-European languages use a transliteration of "Pluto" as their name for the object; some Indian languages use a form of Yama, the Guardian of Hell in Hindu mythology, such as the Gujarati ''Yamdev''.

Demise of Planet X

{| class=wikitable style="text-align:center; font-size:11px; float:right; margin:2px" |+ Mass estimates for Pluto: !Year!! Mass!!Notes |- |1931 || 1 Earth ||Nicholson & Mayall |- |1948|| 0.1 (1/10) Earth || Kuiper |- |1976||0.01 (1/100) Earth ||Cruikshank, Pilcher, & Morrison |- |1978||0.002 (1/500) Earth || Christy & Harrington |} Once found, Pluto's faintness and lack of a resolvable disc cast doubt on the idea that it was Lowell's Planet X. Estimates of Pluto's mass were revised downward throughout the 20th century. In 1978, the discovery of Pluto's moon Charon allowed the measurement of Pluto's mass for the first time. Its mass, roughly 0.2% that of the Earth, was far too small to account for the discrepancies in the orbit of Uranus. Subsequent searches for an alternate Planet X, notably by Robert Sutton Harrington, failed. In 1992, Myles Standish used data from ''Voyager 2'''s 1989 flyby of Neptune, which had revised the planet's total mass downward by 0.5%, to recalculate its gravitational effect on Uranus. With the new figures added in, the discrepancies, and with them the need for a Planet X, vanished. Today, the majority of scientists agree that Planet X, as Lowell defined it, does not exist. Lowell had made a prediction of Planet X's position in 1915 that was fairly close to Pluto's position at that time; Ernest W. Brown concluded almost immediately that this was a coincidence, a view still held today.

Orbit and rotation

Pluto's orbital period is 248 Earth years. Its orbital characteristics are substantially different from those of the planets, which follow nearly circular orbits around the Sun close to a flat reference plane called the ecliptic. In contrast, Pluto's orbit is highly inclined relative to the ecliptic (over 17°) and highly eccentric (elliptical). This high eccentricity means a small region of Pluto's orbit lies nearer the Sun than Neptune's. The Pluto–Charon barycentre came to perihelion on September 5, 1989, and was last closer to the Sun than Neptune between February 7, 1979 and February 11, 1999. Detailed calculations indicate that the previous such occurrence lasted only fourteen years, from July 11, 1735 to September 15, 1749, whereas between April 30, 1483 and July 23, 1503, it had also lasted 20 years. The durations of the relationship vary because of the varying speed of motion of Neptune along its orbit; the relationship between the ''orbits'' themselves varies much more slowly, as Neptune's orbit precesses and otherwise evolves.

Although this repeating pattern may suggest a regular structure, in the long term Pluto's orbit is in fact chaotic. While computer simulations can be used to predict its position for several million years (both forward and backward in time), after intervals longer than the Lyapunov time of 10–20 million years, calculations become speculative: Pluto's tiny size makes it sensitive to unmeasurably small details of the Solar System, hard-to-predict factors that will gradually disrupt its orbit. Millions of years from now, Pluto may well be at aphelion, at perihelion or anywhere in between, with no way for us to predict which. This does not mean Pluto's orbit itself is unstable, but its position ''on'' that orbit is impossible to determine so far ahead. Several resonances and other dynamical effects keep Pluto's orbit stable, safe from planetary collision or scattering.

Relationship with Neptune

Despite Pluto's orbit appearing to cross that of Neptune when viewed from directly above, the two objects' orbits are aligned so that they can never collide or even approach closely. There are several reasons why.

At the simplest level, one can examine the two orbits and see that they do not intersect. When Pluto is closest to the Sun, and hence closest to Neptune's orbit as viewed from above, it is also the farthest above Neptune's path. Pluto's orbit passes about 8 AU above that of Neptune, preventing a collision. Pluto's ascending and descending nodes, the points at which its orbit crosses the ecliptic, are currently separated from Neptune's by over 21°.

This alone is not enough to protect Pluto; perturbations from the planets (especially Neptune) could alter aspects of Pluto's orbit (such as its orbital precession) over millions of years so that a collision could be possible. Some other mechanism or mechanisms must therefore be at work. The most significant of these is that Pluto lies in the 3:2 mean motion resonance with Neptune: for every three of Neptune's orbits around the Sun, Pluto makes two. The two objects then return to their initial positions and the cycle repeats, each cycle lasting about 500 years. This pattern is configured so that, in each 500-year cycle, the first time Pluto is near perihelion Neptune is over 50° ''behind'' Pluto. By Pluto's second perihelion, Neptune will have completed a further one and a half of its own orbits, and so will be a similar distance ''ahead'' of Pluto. Pluto and Neptune's minimum separation is over 17 AU. Pluto comes closer to Uranus (11 AU) than it does to Neptune.

The 3:2 resonance between the two bodies is highly stable, and is preserved over millions of years. This prevents their orbits from changing relative to one another; the cycle always repeats in the same way, and so the two bodies can never pass near to each other. Thus, even if Pluto's orbit were not highly inclined the two bodies could never collide.

Other factors

Numerical studies have shown that over periods of millions of years, the general nature of the alignment between Pluto and Neptune's orbits does not change. There are several other resonances and interactions that govern the details of their relative motion, and enhance Pluto's stability. These arise principally from two additional mechanisms (besides the 3:2 mean motion resonance).

First, Pluto's argument of perihelion, the angle between the point where it crosses the ecliptic and the point where it is closest to the Sun, librates around 90°. This means that when Pluto is nearest the Sun, it is at its farthest above the plane of the Solar System, preventing encounters with Neptune. This is a direct consequence of the Kozai mechanism, which relates the eccentricity of an orbit to its inclination to a larger perturbing body—in this case Neptune. Relative to Neptune, the amplitude of libration is 38°, and so the angular separation of Pluto's perihelion to the orbit of Neptune is always greater than 52° (= 90°–38°). The closest such angular separation occurs every 10,000 years.

Second, the longitudes of ascending nodes of the two bodies—the points where they cross the ecliptic—are in near-resonance with the above libration. When the two longitudes are the same—that is, when one could draw a straight line through both nodes and the Sun—Pluto's perihelion lies exactly at 90°, and it comes closest to the Sun at its peak above Neptune's orbit. In other words, when Pluto most closely intersects the plane of Neptune's orbit, it must be at its farthest beyond it. This is known as the ''1:1 superresonance'', and is controlled by all the Jovian planets.

To understand the nature of the libration, imagine a polar point of view, looking down on the ecliptic from a distant vantage point where the planets orbit counter-clockwise. After passing the ascending node, Pluto is interior to Neptune's orbit and moving faster, approaching Neptune from behind. The strong gravitational pull between the two causes angular momentum to be transferred to Pluto, at Neptune's expense. This moves Pluto into a slightly larger orbit, where it travels slightly slower, according to Kepler's third law. As its orbit changes, this has the gradual effect of changing the pericentre and longitudes of Pluto (and, to a lesser degree, of Neptune). After many such repetitions, Pluto is sufficiently slowed, and Neptune sufficiently speeded up, that Neptune begins to catch Pluto at the opposite side of its orbit (near the opposing node to where we began). The process is then reversed, and Pluto loses angular momentum to Neptune, until Pluto is sufficiently speeded up that it begins to catch Neptune again at the original node. The whole process takes about 20,000 years to complete.

Rotation

Pluto's rotation period, its day, is equal to 6.39 Earth days. Like Uranus, Pluto rotates on its "side" on its orbital plane, with an axial tilt of 120°, and so its seasonal variation is extreme; at its solstices, one-fourth of its surface is in permanent daylight, while another fourth is in permanent darkness.

Physical characteristics

Pluto's distance from Earth makes in-depth investigation difficult. Many details about Pluto will remain unknown until 2015, when the New Horizons spacecraft is expected to arrive there.

Appearance and surface

Pluto's visual apparent magnitude averages 15.1, brightening to 13.65 at perihelion. To see it, a telescope is required; around 30 cm (12 in) aperture being desirable. It looks star-like and without a visible disk even in large telescopes, because its angular diameter is only 0.11". Distance, and current limits on telescope technology, make it impossible to directly photograph surface details on Pluto.

The earliest maps of Pluto, made in the late 1980s, were brightness maps created from close observations of eclipses by its largest moon, Charon. Observations were made of the change in the total average brightness of the Pluto–Charon system during the eclipses. For example, eclipsing a bright spot on Pluto makes a bigger total brightness change than eclipsing a dark spot. Computer processing of many such observations can be used to create a brightness map. This method can also track changes in brightness over time.

Current maps have been produced from images from the Hubble Space Telescope (HST), which offers the highest resolution currently available, and show considerably more detail, resolving variations several hundred kilometres across, including polar regions and large bright spots. The maps are produced by complex computer processing, which find the best-fit projected maps for the few pixels of the Hubble images. The two cameras on the HST used for these maps are no longer in service, so these will likely remain the most detailed maps of Pluto until the 2015 flyby of New Horizons.

These maps, together with Pluto's lightcurve and the periodic variations in its infrared spectra, reveal that Pluto's surface is remarkably varied, with large changes in both brightness and colour. Pluto is one of the most contrastive bodies in the Solar System, with as much contrast as Saturn's moon Iapetus. The colour varies between charcoal black, dark orange and white: Buie et al. term it "significantly less red than Mars and much more similar to the hues seen on Io with a slightly more orange cast". Pluto's surface has changed between 1994 and 2002-3: the northern polar region has brightened and the southern hemisphere darkened. Pluto's overall redness has also increased substantially between 2000 and 2002. These rapid changes are probably related to seasonal variation, which is expected to be complex due to Pluto's extreme axial tilt and high orbital eccentricity.

Spectroscopic analysis of Pluto's surface reveals it to be composed of more than 98 percent nitrogen ice, with traces of methane and carbon monoxide. The face of Pluto oriented toward Charon contains more methane ice, while the opposite face contains more nitrogen and carbon monoxide ice.

Structure

Observations by the Hubble Space Telescope place Pluto's density at between 1.8 and 2.1 g/cm³, suggesting its internal composition consists of roughly 50–70 percent rock and 30–50 percent ice by mass. Because decay of radioactive minerals would eventually heat the ices enough for the rock to separate from them, scientists expect that Pluto's internal structure is differentiated, with the rocky material having settled into a dense core surrounded by a mantle of ice. The diameter of the core should be around 1,700 km, 70% of Pluto's diameter. It is possible that such heating continues today, creating a subsurface ocean layer of liquid water some thick at the core–mantle boundary. The DLR ''Institute of Planetary Research'' calculated that Pluto's density-to-radius ratio lies in a transition zone, along with Neptune's moon Triton, between icy satellites like the mid-sized moons of Uranus and Saturn, and rocky satellites such as Jupiter's Europa.

Mass and size

Pluto's mass is 1.31×10²² kg, less than 0.24 percent that of the Earth, while its diameter is 2,306 (+/- 20) km, or roughly 66% that of the Moon. Pluto's atmosphere complicates determining its true solid size within a certain margin.

Astronomers, assuming Pluto to be Lowell's Planet X, initially calculated its mass based on its presumed effect on Neptune and Uranus. In 1955 Pluto was calculated to be roughly the mass of the Earth, with further calculations in 1971 bringing the mass down to roughly that of Mars. In 1976, Dale Cruikshank, Carl Pilcher and David Morrison of the University of Hawaii calculated Pluto's albedo for the first time, finding that it matched that for methane ice; this meant Pluto had to be exceptionally luminous for its size and therefore could not be more than 1 percent the mass of the Earth. Pluto's albedo is 1.3–2.0 times greater than that of Earth.

The discovery of Pluto's satellite Charon in 1978 enabled a determination of the mass of the Pluto–Charon system by application of Newton's formulation of Kepler's third law. Once Charon's gravitational effect was measured, Pluto's true mass could be determined. Observations of Pluto in occultation with Charon allowed scientists to establish Pluto's diameter more accurately, while the invention of adaptive optics allowed them to determine its shape more accurately.

{| class=wikitable style="text-align:center; font-size:11px; float:right; margin:2px" |+ Selected size estimates for Pluto: !Year!! Radius (Diameter)!! Notes |- | 1993 || 1195 (2390) km || Millis, et al. (If no haze) |- | 1993 || 1180 (2360) km || Millis, et al. (surface & haze) |- | 1994 || 1164 (2328) km || Young & Binzel |- | 2006 || 1153 (2306) km || Buie, et al. |- | 2007 || 1161 (2322) km|| Young, Young, & Buie |}

Among the objects of the Solar System, Pluto is much less massive than the terrestrial planets, and at less than 0.2 lunar masses, it is also less massive than seven moons: Ganymede, Titan, Callisto, Io, Earth's Moon, Europa and Triton. Pluto is more than twice the diameter and a dozen times the mass of the dwarf planet Ceres, the largest object in the asteroid belt. It is less massive than the dwarf planet Eris, a trans-Neptunian object discovered in 2005. Given the error bars in the different size estimates, it is currently unknown whether Eris or Pluto has the larger diameter. Both Pluto and Eris are estimated to have solid-body diameters of about 2330 km. Determinations of Pluto's size are complicated by its atmosphere, and possible hydrocarbon haze.

Atmosphere

Pluto's atmosphere consists of a thin envelope of nitrogen, methane, and carbon monoxide gases, which are derived from the ices of these substances on its surface. Its surface pressure ranges from 6.5 to 24 μbar. Pluto's elongated orbit is predicted to have a major effect on its atmosphere: as Pluto moves away from the Sun, its atmosphere should gradually freeze out, and fall to the ground. When Pluto is closer to the Sun, the temperature of Pluto's solid surface increases, causing the ices to sublimate into gas. This creates an anti-greenhouse effect; much as sweat cools the body as it evaporates from the surface of the skin, this sublimation cools the surface of Pluto. Scientists using the Submillimeter Array have recently discovered that Pluto's temperature is about , 10 K colder than would otherwise be expected.

The presence of methane, a powerful greenhouse gas, in Pluto's atmosphere creates a temperature inversion, with average temperatures 36 K warmer 10 km above the surface. The lower atmosphere contains a higher concentration of methane than its upper atmosphere.

The first evidence of Pluto's atmosphere was found by the Kuiper Airborne Observatory in 1985, from observations of the occultation of a star behind Pluto. When an object with no atmosphere moves in front of a star, the star abruptly disappears; in the case of Pluto, the star dimmed out gradually. From the rate of dimming, the atmospheric pressure was determined to be 0.15 pascal, roughly 1/700,000 that of Earth. The conclusion was confirmed and significantly strengthened by extensive observations of another similar occultation in 1988.

In 2002, another occultation of a star by Pluto was observed and analysed by teams led by Bruno Sicardy of the Paris Observatory, James L. Elliot of MIT, and Jay Pasachoff of Williams College. Surprisingly, the atmospheric pressure was estimated to be 0.3 pascal, even though Pluto was farther from the Sun than in 1988 and thus should have been colder and had a more rarefied atmosphere. One explanation for the discrepancy is that in 1987 the south pole of Pluto came out of shadow for the first time in 120 years, causing extra nitrogen to sublimate from the polar cap. It will take decades for the excess nitrogen to condense out of the atmosphere as it freezes onto the north pole's now permanently dark ice cap. Spikes in the data from the same study revealed what may be the first evidence of wind in Pluto's atmosphere. Another stellar occultation was observed by the MIT-Williams College team of James Elliot, Jay Pasachoff, and a Southwest Research Institute team led by Leslie Young on June 12, 2006 from sites in Australia.

In October 2006, Dale Cruikshank of NASA/Ames Research Center (a New Horizons co-investigator) and his colleagues announced the spectroscopic discovery of ethane on Pluto's surface. This ethane is produced from the photolysis or radiolysis (i.e., the chemical conversion driven by sunlight and charged particles) of frozen methane on Pluto's surface and suspended in its atmosphere.

Satellites

Pluto has four known natural satellites: Charon, first identified in 1978 by astronomer James Christy; Nix and Hydra, both discovered in 2005, and S/2011 P 1 (provisional name, also known as P4), identified by the Hubble Space Telescope in 2011.

The Plutonian moons are unusually close to Pluto, compared to other observed systems. Moons could potentially orbit Pluto up to 53% (or 69%, if retrograde) of the Hill sphere radius, the stable gravitational zone of Pluto's influence. For example, Psamathe orbits Neptune at 40% of the Hill radius. In the case of Pluto, only the inner 3% of the zone is known to be occupied by satellites. In the discoverers’ terms, the Plutonian system appears to be "highly compact and largely empty", although others have pointed out the possibility of additional objects, including a small ring system.

Charon

The Pluto–Charon system is noteworthy for being the largest of the Solar System's few binary systems, defined as those whose barycentre lies above the primary's surface (617 Patroclus is a smaller example). This and the large size of Charon relative to Pluto has led some astronomers to call it a dwarf double planet. The system is also unusual among planetary systems in that each is tidally locked to the other: Charon always presents the same face to Pluto, and Pluto always presents the same face to Charon: from any position on either body, the other is always at the same position in the sky, or always obscured. Because of this, the rotation period of each is equal to the time it takes the entire system to rotate around its common centre of gravity. Just as Pluto revolves on its side relative to the orbital plane, so the Pluto–Charon system does also. In 2007, observations by the Gemini Observatory of patches of ammonia hydrates and water crystals on the surface of Charon suggested the presence of active cryo-geysers.

Nix and Hydra

Two additional moons of Pluto were imaged by astronomers working with the Hubble Space Telescope on May 15, 2005, and received provisional designations of S/2005 P 1 and S/2005 P 2. The International Astronomical Union officially named Pluto's newest moons Nix (or Pluto II, the inner of the two moons, formerly P 2) and Hydra (Pluto III, the outer moon, formerly P 1), on June 21, 2006.

These small moons orbit Pluto at approximately two and three times the distance of Charon: Nix at 48,700 kilometres and Hydra at 64,800 kilometres from the barycenter of the system. They have nearly circular prograde orbits in the same orbital plane as Charon.

Observations of Nix and Hydra to determine individual characteristics are ongoing. Hydra is sometimes brighter than Nix, suggesting either that it is larger or that different parts of its surface may vary in brightness. Sizes are estimated from albedos. The moons' spectral similarity to Charon suggests a 35% albedo similar to Charon's; this value results in diameter estimates of 46 kilometres for Nix and 61 kilometres for the brighter Hydra. Upper limits on their diameters can be estimated by assuming the 4% albedo of the darkest Kuiper Belt objects; these bounds are 137 ± 11 km and 167 ± 10 km, respectively. At the larger end of this range, the inferred masses are less than 0.3% that of Charon, or 0.03% of Pluto's.

The discovery of the two small moons suggests that Pluto may possess a variable ring system. Small body impacts can create debris that can form into planetary rings. Data from a deep optical survey by the Advanced Camera for Surveys on the Hubble Space Telescope suggest that no ring system is present. If such a system exists, it is either tenuous like the rings of Jupiter or is tightly confined to less than 1,000 km in width.

Similar conclusions have been made from occultation studies. In imaging the Plutonian system, observations from Hubble placed limits on any additional moons. With 90% confidence, no additional moons larger than 12 km (or a maximum of 37 km with an albedo of 0.041) exist beyond the glare of Pluto 5 arcseconds from the dwarf planet. This assumes a Charon-like albedo of 0.38; at a 50% confidence level the limit is 8 kilometres.

S/2011 P 1

On July 20, 2011 Mark Showalter of the SETI Institute announced the discovery of a fourth moon of Pluto, provisionally named S/2011 P 1 or P4. It was noticed by NASA's Hubble Space Telescope during a survey searching for rings around the dwarf planet. It has an estimated diameter of 8 to 21 miles (13 to 34 km) and is located between the orbits of Nix and Hydra.

S/2011 P 1 was first seen in a photo taken with Hubble's Wide Field Camera 3 on June 28. It was confirmed in subsequent Hubble pictures taken on July 3 and July 18.

Near resonances

Nix and Hydra and are very close to (but not in) 4:1 and 6:1 mean motion orbital resonances with Charon. S/2011 P 1 fits neatly into this arrangement with a near 5:1 resonance with Charon. Determining how close any of these near integer orbital period ratios might actually be to a true resonance requires accurate knowledge of the satellites' precessions.

1930 ,

+ Pluto and its satellites, with Earth's Moon comparison
colspan="2"	Name	Help:IPA for English>Pronunciation)	! Discovery Year	! Diameter (km)	! Mass (kg)	! Orbital radius (km)(barycentric)	! Orbital period (d)
Pluto		|	2,306(66% Moon)	13,050 (18% Moon)	2,040 (0.6% Moon)
Charon (moon)	Charon	|	1978	1,205 (35% Moon)	1,520 (2% Moon)	17,530 (5% Moon)	6.3872(25% Moon)
Nix (moon)	Nix	|	2005	91	4	48,708	24.856
S/2011 P 1	|	2011	13–34		~59,000	32.1
Hydra (moon)	Hydra	|	2005	114	8	64,749	38.206

Mass of Nix and Hydra assumes icy/porous density of 1.0 g/cm³

Origins

Pluto's origin and identity had long puzzled astronomers. One early hypothesis was that Pluto was an escaped moon of Neptune, knocked out of orbit by its largest current moon, Triton. This notion has been heavily criticised because Pluto never comes near Neptune in its orbit.

Pluto's true place in the Solar System began to reveal itself only in 1992, when astronomers found a population of small icy objects beyond Neptune that were similar to Pluto not only in orbit but also in size and composition. This trans-Neptunian population is believed to be the source of many short-period comets. Astronomers now believe Pluto to be the largest member of the Kuiper belt, a somewhat stable ring of objects located between 30 and 50 AU from the Sun. Like other Kuiper belt objects (KBOs), Pluto shares features with comets; for example, the solar wind is gradually blowing Pluto's surface into space, in the manner of a comet. If Pluto were placed as near to the Sun as Earth, it would develop a tail, as comets do.

Though Pluto is the largest of the Kuiper belt objects discovered so far, Neptune's moon Triton, which is slightly larger than Pluto, is similar to it both geologically and atmospherically, and is believed to be a captured Kuiper belt object. Eris (see below) is also larger than Pluto but is not strictly considered a member of the Kuiper belt population. Rather, it is considered a member of a linked population called the scattered disc.

A large number of Kuiper belt objects, like Pluto, possess a 3:2 orbital resonance with Neptune. KBOs with this orbital resonance are called "plutinos", after Pluto.

Like other members of the Kuiper belt, Pluto is thought to be a residual planetesimal; a component of the original protoplanetary disc around the Sun that failed to fully coalesce into a full-fledged planet. Most astronomers agree that Pluto owes its current position to a sudden migration undergone by Neptune early in the Solar System's formation. As Neptune migrated outward, it approached the objects in the proto-Kuiper belt, setting one in orbit around itself, which became its moon Triton, locking others into resonances and knocking others into chaotic orbits. The objects in the scattered disc, a dynamically unstable region beyond the Kuiper belt, are believed to have been placed in their current positions by interactions with Neptune's migrating resonances. A 2004 computer model by Alessandro Morbidelli of the Observatoire de la Côte d'Azur in Nice suggested that the migration of Neptune into the Kuiper belt may have been triggered by the formation of a 1:2 resonance between Jupiter and Saturn, which created a gravitational push that propelled both Uranus and Neptune into higher orbits and caused them to switch places, ultimately doubling Neptune's distance from the Sun. The resultant expulsion of objects from the proto-Kuiper belt could also explain the Late Heavy Bombardment 600 million years after the Solar System's formation and the origin of Jupiter's Trojan asteroids. It is possible that Pluto had a near-circular orbit about 33 AU from the Sun before Neptune's migration perturbed it into a resonant capture. The Nice model requires that there were about a thousand Pluto-sized bodies in the original planetesimal disk; these may have included the bodies which became Triton and Eris.

Exploration

Pluto presents significant challenges for spacecraft because of its small mass and great distance from Earth. ''Voyager 1'' could have visited Pluto, but controllers opted instead for a close flyby of Saturn's moon Titan, resulting in a trajectory incompatible with a Pluto flyby. ''Voyager 2'' never had a plausible trajectory for reaching Pluto. No serious attempt to explore Pluto by spacecraft occurred until the last decade of the 20th century. In August 1992, JPL scientist Robert Staehle telephoned Pluto's discoverer, Clyde Tombaugh, requesting permission to visit his planet. "I told him he was welcome to it," Tombaugh later remembered, "though he's got to go one long, cold trip." Despite this early momentum, in 2000, NASA cancelled the ''Pluto Kuiper Express'' mission, citing increasing costs and launch vehicle delays.

After an intense political battle, a revised mission to Pluto, dubbed ''New Horizons'', was granted funding from the US government in 2003. ''New Horizons'' was launched successfully on January 19, 2006. The mission leader, S. Alan Stern, confirmed that some of the ashes of Clyde Tombaugh, who died in 1997, had been placed aboard the spacecraft.

In early 2007 the craft made use of a gravity assist from Jupiter. Its closest approach to Pluto will be on July 14, 2015; scientific observations of Pluto will begin 5 months before closest approach and will continue for at least a month after the encounter. ''New Horizons'' captured its first (distant) images of Pluto in late September 2006, during a test of the Long Range Reconnaissance Imager (LORRI). The images, taken from a distance of approximately 4.2 billion kilometres, confirm the spacecraft's ability to track distant targets, critical for maneuvering toward Pluto and other Kuiper Belt objects.

''New Horizons'' will use a remote sensing package that includes imaging instruments and a radio science investigation tool, as well as spectroscopic and other experiments, to characterise the global geology and morphology of Pluto and its moon Charon, map their surface composition and analyse Pluto's neutral atmosphere and its escape rate. ''New Horizons'' will also photograph the surfaces of Pluto and Charon.

The discovery of Pluto's two small moons, Nix and Hydra, may present unforeseen challenges for the probe. Debris from collisions between Kuiper belt objects and the smaller moons, with their relatively low escape velocities, may produce a tenuous dusty ring. Were New Horizons to fly through such a ring system, there would be an increased potential for damage that could disable the probe.

Concepts

A Pluto orbiter/lander/sample return mission using the MITEE nuclear engine was proposed in 2003. The plan included a twelve year trip to Pluto from Earth, then mapping from orbit, multiple landings, warm water probe, and possible ''in situ'' propellant production for another twelve year trip back to Earth with samples. Power and propulsion would come from the bi-modal nuclear reactor system.

Classification

After Pluto's place within the Kuiper belt was determined, its official status as a planet became controversial, with many questioning whether Pluto should be considered together with or separately from its surrounding population.

Museum and planetarium directors occasionally created controversy by omitting Pluto from planetary models of the Solar System. The Hayden Planetarium reopened after renovation in 2000 with a model of only eight planets. The controversy made headlines at the time.

In 2002, the KBO 50000 Quaoar was discovered, with a diameter then thought to be roughly 1280 kilometres, about half that of Pluto. In 2004, the discoverers of 90377 Sedna placed an upper limit of 1800 km on its diameter, nearer to Pluto's diameter of 2320 km, although Sedna's diameter was revised downward to less than 1600 km by 2007. Just as Ceres, Pallas, Juno and Vesta eventually lost their planet status after the discovery of many other asteroids, so, it was argued, Pluto should be reclassified as one of the Kuiper belt objects.

On July 29, 2005, the discovery of a new Trans-Neptunian object was announced. Named Eris, it is now known to be approximately the same size as Pluto. This was the largest object discovered in the Solar System since Triton in 1846. Its discoverers and the press initially called it the tenth planet, although there was no official consensus at the time on whether to call it a planet. Others in the astronomical community considered the discovery the strongest argument for reclassifying Pluto as a minor planet.

2006: IAU classification

The debate came to a head in 2006 with an IAU resolution that created an official definition for the term "planet". According to this resolution, there are three main conditions for an object to be considered a 'planet': # The object must be in orbit around the Sun. # The object must be massive enough to be a sphere by its own gravitational force. More specifically, its own gravity should pull it into a shape of hydrostatic equilibrium. # It must have cleared the neighbourhood around its orbit.

Pluto fails to meet the third condition, since its mass is only 0.07 times that of the mass of the other objects in its orbit (Earth's mass, by contrast, is 1.7 million times the remaining mass in its own orbit). The IAU further resolved that Pluto be classified in the simultaneously created dwarf planet category, and that it act as the prototype for the plutoid category of trans-Neptunian objects, in which it would be separately, but concurrently, classified.

On September 13, 2006, the IAU included Pluto, Eris, and the Eridian moon Dysnomia in their Minor Planet Catalogue, giving them the official minor planet designations "(134340) Pluto", "(136199) Eris", and "(136199) Eris I Dysnomia". If Pluto had been given a minor planet name upon its discovery, the number would have been ca. 1,164 rather than 134,340.

There has been some resistance within the astronomical community toward the reclassification. Alan Stern, principal investigator with NASA's ''New Horizons'' mission to Pluto, has publicly derided the IAU resolution, stating that "the definition stinks, for technical reasons." Stern's contention is that by the terms of the new definition Earth, Mars, Jupiter, and Neptune, all of which share their orbits with asteroids, would be excluded. His other claim is that because less than five percent of astronomers voted for it, the decision was not representative of the entire astronomical community. Marc W. Buie of the Lowell observatory has voiced his opinion on the new definition on his website and is one of the petitioners against the definition. Others have supported the IAU. Mike Brown, the astronomer who discovered Eris, said "through this whole crazy circus-like procedure, somehow the right answer was stumbled on. It’s been a long time coming. Science is self-correcting eventually, even when strong emotions are involved."

Researchers on both sides of the debate gathered on August 14–16, 2008, at The Johns Hopkins University Applied Physics Laboratory for a conference that included back-to-back talks on the current IAU definition of a planet. Entitled "The Great Planet Debate", the conference published a post-conference press release indicating that scientists could not come to a consensus about the definition of a planet. Just before the conference, on June 11, 2008, the IAU announced in a press release that the term "plutoid" would henceforth be used to describe Pluto and other objects similar to Pluto which have an orbital semimajor axis greater than that of Neptune and enough mass to be of near-spherical shape.

American public's reaction

Reception to the IAU decision was mixed. While some accepted the reclassification, others seek to overturn the decision with online petitions urging the IAU to consider reinstatement. A resolution introduced by some members of the California state assembly light-heartedly denounces the IAU for "scientific heresy," among other crimes. The U.S. state of New Mexico's House of Representatives passed a resolution in honor of Tombaugh, a longtime resident of that state, which declared that Pluto will always be considered a planet while in New Mexican skies and that March 13, 2007 was Pluto Planet Day. The Illinois State Senate passed a similar resolution in 2009, on the basis that Clyde Tombaugh, the discoverer of Pluto, was born in Illinois. The resolution asserted that Pluto was "unfairly downgraded to a 'dwarf' planet" by the IAU.

Some members of the public have also rejected the change, citing the disagreement within the scientific community on the issue, or for sentimental reasons, maintaining that they have always known Pluto as a planet and will continue to do so regardless of the IAU decision.

See also

Moons of Pluto

Pluto in astrology

Pluto in fiction

Solar eclipses on Pluto

Dwarf planet

Notes

References

Bibliography

External links

Pluto Profile at NASA's Solar System Exploration site

NASA Pluto factsheet

Website of the observatory that discovered Pluto

Category:Astronomical objects discovered in 1930

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Jack Hannah (January 5, 1913 - June 11, 1994) was an animator, writer and director of animated shorts.

Hannah was born January 15, 1913, in Nogales, Arizona. He moved to Los Angeles in 1931 to study at the Art Guild Academy. One of his first jobs was designing movie posters for Hollywood theaters. In 1933, during the Great Depression, Hannah dropped off his portfolio at Walt Disney Studios, and soon afterward was hired as an in-between and clean-up artist, working on Mickey Mouse, Donald Duck, and Silly Symphony cartoons.

Hannah's career as an animator commenced with the short ''Modern Inventions'' (released on May 29, 1937). After thirteen films in that capacity, he was assigned to the story department writing cartoon short continuities, beginning with ''Donald's Nephews'' (released on April 15, 1938). He received writing credit on 21 Disney cartoon shorts.

In 1942 he collaborated with Carl Barks on the first two comic books Barks worked on, ''Pluto Saves the Ship'' and ''Donald Duck Finds Pirate Gold''. Hannah in subsequent years did a handful of other Donald Duck comic book stories but, unlike Barks, he stayed at the studio and eventually was given a chance to be a director. The short ''Donald's Off Day'' (released on December 8, 1944) was the first of 94 films he would direct. These include most of the shorts featuring Donald Duck in the post-war era along with all starring Chip 'n Dale and Humphrey the Bear; he also directed some shorts starring Goofy, Mickey Mouse, Pluto and some minor Walt Disney characters.

After Disney stopped producing animated shorts, Hannah did 14 episodes of the Walt Disney anthology television series (composed of footage from the classic cartoons along with new linking material) and fulfilled his ambition to direct live-action by handling Walt Disney's introductions for the episodes. Hannah hoped to segue into a career in live-action but "Walt had me pegged as an animation director so he balked at the suggestion. We had a few heated discussions and I became aware that I had come to an impasse."

Hannah then went to the Walter Lantz Studio and directed a number of films featuring Woody Woodpecker and some minor characters. Besides directing shorts, Hannah also was Assistant Director for the television series ''The Woody Woodpecker Show'', which began airing on October 3, 1957. "I did more or less the same thing that I did with Walt Disney in directing live-action except Lantz was better at taking direction." His last directing effort was the short ''Charlie's Mother-In-Law'' (released on April 16, 1963). He retired shortly thereafter.

In 1975, Hannah was one of the co-founders, along with T. Hee, of the Character Animation program at the California Institute of the Arts.

Hannah was honored as a "Disney Legend" in 1992. As Carl Barks is credited with creating the personality of Donald Duck's comic book version, Jack Hannah is credited with developing, if not creating, the personality of the animated version. It is for this reason Disney historian Jim Korkis has dubbed him "Donald Duck's Other Daddy."

Hannah died in Burbank, California on June 11, 1994, at age 81.

References

External links

Jack Hannah Remembers ''Pirate Gold''

Donald Duck's Other Daddy (PART ONE)

Category:1913 births Category:1994 deaths Category:American animators

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name	Walt Disney
birth name	Walter Elias Disney
birth date	December 05, 1901
birth place	Hermosa, Chicago, Illinois, U.S.
death date	December 15, 1966
death place	Burbank, California, U.S. Interred: Forest Lawn Memorial Park, Glendale, California, U.S.
occupation	Film producer, Co-founder of The Walt Disney Company, formerly known as Walt Disney Productions
yearsactive	1920–1966
spouse	Lillian Bounds (1925–1966)
parents	Elias DisneyFlora Call Disney
relations	Herbert Arthur Disney (brother)Raymond Arnold Disney (brother)Roy Oliver Disney (brother)Ruth Flora Disney (sister)Ronald William Miller (son-in-law)Robert Borgfeldt Brown (son-in-law)Roy Edward Disney (nephew)
children	Diane Marie DisneySharon Mae Disney
religion	Christian (Congregationalist)
party	Republican
signature	Walt Disney Signature 2.svg }}

Walter Elias "Walt" Disney (December 5, 1901 – December 15, 1966) was an American film producer, director, screenwriter, voice actor, animator, entrepreneur, entertainer, international icon, and philanthropist, well-known for his influence in the field of entertainment during the 20th century. Along with his brother Roy O. Disney, he was co-founder of Walt Disney Productions, which later became one of the best-known motion picture producers in the world. The corporation is now known as The Walt Disney Company and has annual revenues of approximately USD $35 billion.

Disney is particularly noted as a film producer and a popular showman, as well as an innovator in animation and theme park design. He and his staff created some of the world's most well-known fictional characters including Mickey Mouse, for whom Disney himself provided the original voice. During his lifetime he received four honorary Academy Awards and won twenty-two Academy Awards from a total of fifty-nine nominations, including a record four in one year, giving him more awards and nominations than any other individual in history. Disney also won seven Emmy Awards and gave his name to the Disneyland and Walt Disney World Resort theme parks in the U.S., as well as the international resorts Tokyo Disney, Disneyland Paris, and Disneyland Hong Kong.

The year after his December 15, 1966 death from lung cancer in Burbank, California, construction began on Walt Disney World Resort in Florida. His brother Roy Disney inaugurated the Magic Kingdom on October 1, 1971.

1901–1937: Beginnings

Childhood

Disney was born on December 5, 1901, at 2156 N. Tripp Avenue in Chicago's Hermosa community area to Irish-Canadian father Elias Disney and German-American mother Flora Call Disney. His great-grandfather, Arundel Elias Disney, had emigrated from Gowran, County Kilkenny, Ireland where he was born in 1801. Arundel Disney was a descendant of Robert d'Isigny, a Frenchman who had travelled to England with William the Conqueror in 1066. With the d'Isigny name anglicised as "Disney", the family settled in a village now known as Norton Disney, south of the city of Lincoln, in the county of Lincolnshire.

In 1878, Disney's father Elias had moved from Huron County, Ontario, Canada to the United States at first seeking gold in California before finally settling down to farm with his parents near Ellis, Kansas, until 1884. Elias worked for the Union Pacific Railroad and married Flora Call on January 1, 1888, in Acron, Florida. The family moved to Chicago, Illinois, in 1890, hometown of his brother Robert who helped Elias financially for most of his early life. In 1906, when Walt was four, Elias and his family moved to a farm in Marceline, Missouri, where his brother Roy had recently purchased farmland. In Marceline, Disney developed his love for drawing with one of the family's neighbors, a retired doctor named "Doc" Sherwood, paying him to draw pictures of Sherwood's horse, Rupert. His interest in trains also developed in Marceline, a town that owed its existence to the Atchison, Topeka and Santa Fe Railway which ran through it. Walt would put his ear to the tracks in anticipation of the coming train then try and spot his uncle, engineer Michael Martin, running the train.

The Disneys remained in Marceline for four years, before moving to Kansas City in 1911 where Walt and his younger sister Ruth attended the Benton Grammar School. At school he met Walter Pfeiffer who came from a family of theatre aficionados, and introduced Walt to the world of vaudeville and motion pictures. Before long Walt was spending more time at the Pfeiffers' than at home. As well as attending Saturday courses at the Kansas City Art Institute, Walt often took Ruth to Electric Park, 15 blocks from their home, which Disney would later acknowledge as a major influence of his design of Disneyland).

Teenage years

In 1917, Elias acquired shares in the O-Zell jelly factory in Chicago and moved his family back to the city, where in the fall Disney began his freshman year at McKinley High School and took night courses at the Chicago Art Institute. He became the cartoonist for the school newspaper, drawing patriotic topics and focusing on World War I. Despite dropping out of high school at the age of sixteen to join the army, Disney was rejected for being underage.

After his rejection by the army, Walt and a friend decided to join the Red Cross. Soon after joining he was sent to France for a year, where he drove an ambulance, but only after the armistice was signed on November 11, 1918.

Hoping to find work outside the Chicago O-Zell factory, in 1919 Walt moved back to Kansas City to begin his artistic career. After considering whether to become an actor or a newspaper artist, he decided on a career as a newspaper artist, drawing political caricatures or comic strips. But when nobody wanted to hire him as either an artist or even as an ambulance driver, his brother Roy, then working in a local bank, got Walt a temporary job through a bank colleague at the Pesmen-Rubin Art Studio where he created advertisements for newspapers, magazines, and movie theaters. At Pesmen-Rubin he met cartoonist Ubbe Iwerks and when their time at the studio expired, they decided to start their own commercial company together.

In January 1920, Disney and Iwerks formed a short-lived company called, "Iwerks-Disney Commercial Artists". However, following a rough start, Disney left temporarily to earn money at the Kansas City Film Ad Company, and was soon joined by Iwerks who was not able to run their business alone. While working for the Kansas City Film Ad Company, where he made commercials based on cutout animations, Disney became interested in animation, and decided to become an animator. The owner of the Ad Company, A.V. Cauger, allowed him to borrow a camera from work to experiment with at home. After reading the Edwin G. Lutz book ''Animated Cartoons: How They Are Made, Their Origin and Development'', Disney considered cel animation to be much more promising than the cutout animation he was doing for Cauger. Walt eventually decided to open his own animation business, and recruited a fellow co-worker at the Kansas City Film Ad Company, Fred Harman, as his first employee. Walt and Harman then secured a deal with local theater owner Frank L. Newman, arguably the most popular "showman" in the Kansas City area at the time, to screen their cartoons at his local theater, which they titled ''Laugh-O-Grams''.

Laugh-O-Gram Studio

Presented as "Newman Laugh-O-Grams", Disney's cartoons became widely popular in the Kansas City area and through their success, he was able to acquire his own studio, also called Laugh-O-Gram, for which he hired a vast number of additional animators, including Fred Harman's brother Hugh Harman, Rudolf Ising, and his close friend Ubbe Iwerks. Unfortunately, studio profits were insufficient to cover the high salaries paid to employees. Unable to successfully manage money, Disney's studio became loaded with debt and wound up bankrupt whereupon he decided to set up a studio in the movie industry's capital city, Hollywood, California.

Hollywood

Disney and his brother Roy pooled their money and set up a cartoon studio in Hollywood where they needed to find a distributor for Walt's new Alice Comedies, which he had started making while in Kansas City but never got to distribute. Disney sent an unfinished print to New York distributor Margaret Winkler, who promptly wrote back to him that she was keen on a distribution deal for more live-action/animated shorts based upon ''Alice's Wonderland''.

Alice Comedies

Virginia Davis, the live-action star of ''Alice’s Wonderland'' and her family relocated from Kansas City to Hollywood at Disney's request, as did Iwerks and his family. This was the beginning of the Disney Brothers' Studio located on Hyperion Avenue in the Silver Lake district, where it remained until 1939. In 1925, Disney hired a young woman named Lillian Bounds to ink and paint celluloid. After a brief courtship, the pair married that same year.

The new series, ''Alice Comedies'', proved reasonably successful, and featured both Dawn O'Day and Margie Gay as Alice with Lois Hardwick also briefly assuming the role. By the time the series ended in 1927, its focus was more on the animated characters and in particular a cat named Julius who resembled Felix the Cat, rather than the live-action Alice.

Oswald the Lucky Rabbit

By 1927, Charles Mintz had married Margaret Winkler and assumed control of her business. He then ordered a new all-animated series to be put into production for distribution through Universal Pictures. The new series, ''Oswald the Lucky Rabbit'', was an almost instant success, and the character, Oswald — drawn and created by Iwerks — became a popular figure. The Disney studio expanded and Walt re-hired Harman, Rudolph Ising, Carman Maxwell, and Friz Freleng from Kansas City.

Disney went to New York in February 1928 to negotiate a higher fee per short and was shocked when Mintz told him that not only did he want to reduce the fee he paid Disney per short but also that he had most of his main animators, including Harman, Ising, Maxwell, and Freleng—but not Iwerks, who refused to leave Disney—under contract and would start his own studio if Disney did not accept the reduced production budgets. Universal, not Disney, owned the Oswald trademark, and could make the films without Walt. Disney declined Mintz's offer and as a result lost most of his animation staff whereupon he found himself on his own again.

It subsequently took his company 78 years to get back the rights to the Oswald character when in 2006 the Walt Disney Company reacquired the rights to Oswald the Lucky Rabbit from NBC Universal, through a trade for longtime ABC sports commentator Al Michaels.

Mickey Mouse

After losing the rights to Oswald, Disney felt the need to develop a new character to replace him, which was based on a mouse he had adopted as a pet while working in his Laugh-O-Gram studio in Kansas City. Ub Iwerks reworked the sketches made by Disney to make the character easier to animate although Mickey's voice and personality were provided by Disney himself until 1947. In the words of one Disney employee, "Ub designed Mickey's physical appearance, but Walt gave him his soul." Besides Oswald and Mickey, a similar mouse-character is seen in the ''Alice Comedies'', which featured "Ike the Mouse". Moreover, the first Flip the Frog cartoon called Fiddlesticks showed a Mickey Mouse look-alike playing fiddle. The initial films were animated by Iwerks with his name prominently featured on the title cards. Originally named "Mortimer", the mouse was later re-christened "Mickey" by Lillian Disney who thought that the name Mortimer did not fit. Mortimer later became the name of Mickey's rival for Minnie – taller than his renowned adversary and speaking with a Brooklyn accent.

The first animated short to feature Mickey, ''Plane Crazy'' was a silent film like all of Disney's previous works. After failing to find a distributor for the short and its follow-up, ''The Gallopin' Gaucho'', Disney created a Mickey cartoon with sound entitled ''Steamboat Willie''. A businessman named Pat Powers provided Disney with both distribution and Cinephone, a sound-synchronization process. ''Steamboat Willie'' became an instant success, and ''Plane Crazy'', ''The Galloping Gaucho'', and all future Mickey cartoons were released with soundtracks. After the release of ''Steamboat Willie'', Disney successfully used sound in all of his subsequent cartoons, and Cinephone also became the new distributor for Disney's early sound cartoons. Mickey soon eclipsed Felix the Cat as the world's most popular cartoon character and by 1930, despite their having sound, cartoons featuring Felix had faded from the screen after failing to gain attention. Mickey's popularity would subsequently skyrocket in the early 1930s.

''Silly Symphonies''

Following in the footsteps of ''Mickey Mouse series'', a series of musical shorts titled, ''Silly Symphonies'' were released in 1929. The first, ''The Skeleton Dance'' was entirely drawn and animated by Iwerks, who was also responsible for drawing the majority of cartoons released by Disney in 1928 and 1929. Although both series were successful, the Disney studio was not receiving its rightful share of profits from Pat Powers, and in 1930, Disney signed a new distribution deal with Columbia Pictures. The original basis of the cartoons was their musical novelty with the first Silly Symphony cartoons featuring scores by Carl Stalling.

Iwerks was soon lured by Powers into opening his own studio with an exclusive contract, while Stalling would also later leave Disney to join Iwerks. Iwerks launched his ''Flip the Frog'' series with the first voiced color cartoon ''Fiddlesticks'', filmed in two-strip Technicolor. Iwerks also created two other cartoon series, ''Willie Whopper'' and the ''Comicolor''. In 1936, Iwerks shut down his studio in order to work on various projects dealing with animation technology. He would return to Disney in 1940 and go on to pioneer a number of film processes and specialized animation technologies in the studio's research and development department.

By 1932, although Mickey Mouse had become a relatively popular cinema character, ''Silly Symphonies'' was not as successful. The same year also saw competition increase as Max Fleischer's flapper cartoon character, Betty Boop, gained popularity among theater audiences. Fleischer, considered Disney's main rival in the 1930s, was also the father of Richard Fleischer, whom Disney would later hire to direct his 1954 film ''20,000 Leagues Under the Sea''. Meanwhile, Columbia Pictures dropped the distribution of Disney cartoons to be replaced by United Artists. In late 1932, Herbert Kalmus, who had just completed work on the first three-strip technicolor camera, approached Walt and convinced him to reshoot the black and white ''Flowers and Trees'' in three-strip Technicolor. ''Flowers and Trees'' would go on to be a phenomenal success and would also win the first 1932 Academy Award for Best Short Subject: Cartoons. After the release of ''Flowers and Trees'', all subsequent ''Silly Symphony'' cartoons were in color while Disney was also able to negotiate a two-year deal with Technicolor, giving him the sole right to use their three-strip process, a period eventually extended to five years. Through ''Silly Symphonies'', Disney also created his most successful cartoon short of all time, ''The Three Little Pigs'' (1933). The cartoon ran in theaters for many months, featuring the hit song that became the anthem of the Great Depression, "Who's Afraid of the Big Bad Wolf".

First Academy Award

In 1932, Disney received a special Academy Award for the creation of "Mickey Mouse", a series which switched to color in 1935 and soon launched spin-offs for supporting characters such as Donald Duck, Goofy, and Pluto. Pluto and Donald became standalone cartoons in 1937, with Goofy following in 1939. Of all Mickey's partners, Donald Duck, who first teamed up with Mickey in the 1934 cartoon, ''Orphan's Benefit'', was arguably the most popular, going on to become Disney's second most successful cartoon character of all time.

Children

The Disneys' first attempt at pregnancy ended when Lillian miscarried. She became pregnant again and gave birth to a daughter, Diane Marie Disney, on December 18, 1933. The Disneys adopted Sharon Mae Disney (December 31, 1936 – February 16, 1993).

1937–1941: Golden age of animation

"Disney's Folly": ''Snow White and the Seven Dwarfs''

[[Image:Walt Disney Snow white 1937 trailer screenshot (13).jpg|left|thumb|Walt Disney introduces each of the Seven Dwarfs in a scene from the original 1937 ''Snow White'' theatrical trailer.]]

Following the creation of two cartoon series, in 1934 Disney began planning a full-length feature. The following year, opinion polls showed that another cartoon series, ''Popeye the Sailor'', produced by Max Fleischer, was more popular than Mickey Mouse. Nevertheless, Disney was able to put Mickey back on top as well as increase his popularity by colorizing and partially redesigning the character to become what was considered his most appealing design to date. When the film industry learned of Disney's plans to produce an ''animated'' feature-length version of ''Snow White'', they were certain that the endeavor would destroy the Disney Studio and dubbed the project "Disney's Folly". Both Lillian and Roy tried to talk Disney out of the project, but he continued plans for the feature, employing Chouinard Art Institute professor Don Graham to start a training operation for the studio staff. Disney then used the ''Silly Symphonies'' as a platform for experiments in realistic human animation, distinctive character animation, special effects, and the use of specialized processes and apparatus such as the multiplane camera – a new technique first used by Disney in the 1937 ''Silly Symphonies'' short ''The Old Mill''.

All of this development and training was used to increase quality at the studio and to ensure that the feature film would match Disney's quality expectations. Entitled ''Snow White and the Seven Dwarfs'', the feature went into full production in 1934 and continued until mid-1937, when the studio ran out of money. To obtain the funding to complete ''Snow White'', Disney had to show a rough cut of the motion picture to loan officers at the Bank of America, who then gave the studio the money to finish the picture. The film premiered at the Carthay Circle Theater on December 21, 1937 and at its conclusion the audience gave ''Snow White and the Seven Dwarfs'' a standing ovation. ''Snow White'', the first animated feature in America made in Technicolor, was released in February 1938 under a new distribution deal with RKO Radio Pictures. RKO had been the distributor for Disney cartoons in 1936, after it closed down the Van Beuren Studios in exchange for distribution. The film became the most successful motion picture of 1938 and earned over $8 million on its initial release.

Golden age of animation

Following the success of ''Snow White'', for which Disney received one full-size, and seven miniature Oscar statuettes, he was able to build a new campus for the Walt Disney Studios in Burbank, which opened for business on December 24, 1939. ''Snow White'' was not only the peak of Disney's success, but also ushered in a period that would later be known as the Golden Age of Animation for the studio. Feature animation staff, having just completed ''Pinocchio'', continued work on ''Fantasia'' and ''Bambi'' as well as the early production stages of ''Alice in Wonderland'', ''Peter Pan'' and ''Wind in the Willows'' while the shorts staff carried on working on the ''Mickey Mouse'', ''Donald Duck'', ''Goofy'', and ''Pluto'' cartoon series, ending the ''Silly Symphonies'' at this time. Animator Fred Moore had redesigned Mickey Mouse in the late 1930s after Donald Duck overtook him in popularity among theater audiences.

''Pinocchio'' and ''Fantasia'' followed ''Snow White and the Seven Dwarfs'' into the movie theaters in 1940, but both proved financial disappointments. The inexpensive ''Dumbo'' was then planned as an income generator, but during production most of the animation staff went on strike, permanently straining relations between Disney and his artists.

1941–1945: World War II era

In 1941, the U.S. State Department sent Disney and a group of animators to South America as part of its Good Neighbor policy, at the same time guaranteeing financing for the resultant movie, ''Saludos Amigos''.

Shortly after the release of ''Dumbo'' in October 1941, the United States entered World War II. The U.S. Army contracted most of the Disney studio's facilities where the staff created training and instruction films for the military, home-front morale-boosting shorts such as ''Der Fuehrer's Face'' and the 1943 feature film ''Victory Through Air Power''. However, military films did not generate income, and the feature film ''Bambi'' underperformed on its release in April 1942. Disney successfully re-issued ''Snow White'' in 1944, establishing a seven-year re-release tradition for his features. In 1945, ''The Three Caballeros'' was the last animated feature released by the studio during the war.

In 1944, ''Encyclopædia Britannica'' publisher William Benton, entered into unsuccessful negotiations with Disney to make six to twelve educational films per annum. Disney was asked by the US Coordinator of Inter-American Affairs, Office of Inter-American Affairs (OIAA), to make an educational film about the Amazon Basin, which resulted in the 1944 animated short, ''The Amazon Awakens''.

1945–1955: Post-war period

Disney studios also created inexpensive package films, containing collections of cartoon shorts, and issued them to theaters during this period. These included ''Make Mine Music'' (1946), ''Melody Time'' (1948), ''Fun and Fancy Free'' (1947) and ''The Adventures of Ichabod and Mr. Toad'' (1949). The latter had only two sections, the first based on ''The Wind in the Willows'' by Kenneth Grahame, and the second on ''The Legend of Sleepy Hollow'' by Washington Irving. During this period, Disney also ventured into full-length dramatic films that mixed live action and animated scenes, including ''Song of the South'' and ''So Dear to My Heart''. After the war ended, Mickey's popularity would also fade.

By the late 1940s, the studio had recovered enough to continue production on the full-length features ''Alice in Wonderland'' and ''Peter Pan'', both of which had been shelved during the war years. Work also began on ''Cinderella'', which became Disney's most successful film since ''Snow White and the Seven Dwarfs''. In 1948 the studio also initiated a series of live-action nature films, titled ''True-Life Adventures'', with ''On Seal Island'' the first. Despite its resounding success with feature films, the studio's animation shorts were no longer as popular as they once were, with people paying more attention to Warner Bros. and their animation star Bugs Bunny. By 1942, Leon Schlesinger Productions, which produced the Warner Bros. cartoons, had become the country's most popular animation studio. However, while Bugs Bunny's popularity rose in the 1940s, so did Donald Duck's, a character who would replace Mickey Mouse as Disney's star character by 1949.

During the mid-1950s, Disney produced a number of educational films on the space program in collaboration with NASA rocket designer Wernher von Braun: ''Man in Space'' and ''Man and the Moon'' in 1955, and ''Mars and Beyond'' in 1957.

Testimony before Congress

Disney was a founding member of the anti-communist Motion Picture Alliance for the Preservation of American Ideals. In 1947, during the early years of the Cold War, Disney testified before the House Un-American Activities Committee (HUAC), where he branded Herbert Sorrell, David Hilberman and William Pomerance, former animators and labor union organizers, Communist agitators. All three men denied the allegations and Sorrell went on to testify before the HUAC in 1946 when insufficient evidence was found to link him to the Communist Party.

Disney also accused the Screen Actors Guild of being a Communist front, and charged that the 1941 strike was part of an organized Communist effort to gain influence in Hollywood.

1955–1966: Theme parks and beyond

Planning Disneyland

On a business trip to Chicago in the late-1940s, Disney drew sketches of his ideas for an amusement park where he envisioned his employees spending time with their children. The idea for a children's theme park came after a visit to Children's Fairyland in Oakland, California. This plan was originally intended to be built on a plot located across the street to the south of the studio. These original ideas developed into a concept for a larger enterprise that would become Disneyland. Disney spent five years developing Disneyland and created a new subsidiary company, WED Enterprises, to carry out planning and production of the park. A small group of Disney studio employees joined the Disneyland development project as engineers and planners, and were dubbed Imagineers.

As Disney explained one of his earliest plans to Herb Ryman, who created the first aerial drawing of Disneyland presented to the Bank of America during fund raising for the project, he said, "Herbie, I just want it to look like nothing else in the world. And it should be surrounded by a train." Entertaining his daughters and their friends in his backyard and taking them for rides on his Carolwood Pacific Railroad had inspired Disney to include a railroad in the plans for Disneyland.

Disneyland grand opening

Disneyland officially opened on July 18, 1955. On Sunday, July 17, 1955, Disneyland hosted a live TV preview, among the thousands of people in attendance were Ronald Reagan, Bob Cummings and Art Linkletter, who shared cohosting duties, as well as the mayor of Anaheim. Walt gave the following dedication day speech:

Carolwood Pacific Railroad

During 1949, Disney and his family moved to a new home on a large piece of land in the Holmby Hills district of Los Angeles, California. With the help of his friends Ward and Betty Kimball, who already had their own backyard railroad, Disney developed blueprints and immediately set to work on creating a miniature live steam railroad for his backyard. The name of the railroad, Carolwood Pacific Railroad, came from his home's location on Carolwood Drive. The railroad's half-mile long layout included a long trestle bridge, loops, overpasses, gradients, an elevated berm, and a tunnel underneath his wife's flowerbed. He named the miniature working steam locomotive built by Disney Studios engineer Roger E. Broggie ''Lilly Belle'' in his wife's honor and had his attorney draw up right-of-way papers giving the railroad a permanent, legal easement through the garden areas, which his wife dutifully signed; however, there is no evidence of the documents ever recorded as a restriction on the property's title.

Expansion into new areas

As Walt Disney Productions began work on Disneyland, it also began expanding its other entertainment operations. In 1950, ''Treasure Island'' became the studio's first all-live-action feature, soon followed by ''20,000 Leagues Under the Sea'' (in CinemaScope, 1954), ''Old Yeller'' (1957), ''The Shaggy Dog'' (1959), ''Pollyanna'' (1960), ''Swiss Family Robinson'' (1960), ''The Absent-Minded Professor'' (1961), and ''The Parent Trap'' (1961). The studio produced its first TV special, ''One Hour in Wonderland'', in 1950. Disney began hosting a weekly anthology series on ABC entitled ''Disneyland'', after the park, on which he aired clips of past Disney productions, gave tours of his studio, and familiarized the public with Disneyland as it was being constructed in Anaheim. The show also featured a Davy Crockett miniseries, which started the "Davy Crockett craze" among American youth, during which millions of coonskin caps and other Crockett memorabilia were sold across the country. In 1955, the studio's first daily television show, ''Mickey Mouse Club'' debuted and would continue in various incarnations into the 1990s.

As the studio expanded and diversified into other media, Disney devoted less of his attention to the animation department, entrusting most of its operations to his key animators, whom he dubbed the Nine Old Men. Although he was spending less time supervising the production of the animated films, he was always present at story meetings.. During Disney's lifetime, the animation department created the successful ''Lady and the Tramp'' ( the first animated film in CinemaScope) in 1955, ''Sleeping Beauty'' ( the first animated film in Super Technirama 70mm) in 1959, ''One Hundred and One Dalmatians'' (the first animated feature film to use Xerox cels) in 1961, and ''The Sword in the Stone'' in 1963.

Production of short cartoons kept pace until 1956, when Disney shut down the responsible division although special shorts projects would continue for the remainder of the studio's duration on an irregular basis. These productions were all distributed by Disney's new subsidiary, Buena Vista Distribution, which had taken over all distribution duties for Disney films from RKO by 1955. Disneyland, one of the world's first theme parks, finally opened on July 17, 1955, and was immediately successful. Visitors from around the world came to visit Disneyland, which contained attractions based on a number of successful Disney characters and films.

After 1955, the ''Disneyland'' TV show was renamed ''Walt Disney Presents''. It switched from black-and-white to color in 1961 and changed its name to ''Walt Disney's Wonderful World of Color'', at the same time moving from ABC to NBC, and eventually evolving into its current form as ''The Wonderful World of Disney''. The series continued to air on NBC until 1981, when it was picked up by CBS. Since then, it has aired on ABC, NBC, the Hallmark Channel and the Cartoon Network via separate broadcast rights deals. During its run, the Disney series offered some recurring characters, such as the newspaper reporter and sleuth "Gallegher" played by Roger Mobley with a plot based on the writings of Richard Harding Davis.

Disney had already formed his own music publishing division in 1949 and in 1956, partly inspired by the huge success of the television theme song The Ballad of Davy Crockett, he created a company-owned record production and distribution entity called Disneyland Records.

Early 1960s successes

By the early 1960s, the Disney empire had become a major success, and Walt Disney Productions had established itself as the world's leading producer of family entertainment. Walt Disney was the Head of Pageantry for the 1960 Winter Olympics.

After decades of pursuit, Disney finally acquired the rights to P.L. Travers' books about a magical nanny. ''Mary Poppins'', released in 1964, was the most successful Disney film of the 1960s and featured a memorable song score written by Disney favorites, the Sherman Brothers. The same year, Disney debuted a number of exhibits at the 1964 New York World's Fair, including Audio-Animatronic figures, all of which were later integrated into attractions at Disneyland and a new theme park project which was to be established on the East Coast.

Although the studio would probably have proved major competition for Hanna-Barbera, Disney decided not to enter the race and mimic Hanna-Barbera by producing Saturday morning TV cartoon series. With the expansion of Disney's empire and constant production of feature films, the financial burden involved in such a move would have proven too great.

Plans for Disney World and EPCOT

In early 1964, Disney announced plans to develop another theme park to be called Disney World a few miles west of Orlando, Florida. Disney World was to include "the Magic Kingdom", a larger, more elaborate version of Disneyland. It would also feature a number of golf courses and resort hotels. The heart of Disney World, however, was to be the Experimental Prototype City (or Community) of Tomorrow, known as EPCOT for short.

Mineral King Ski Resort

During the early to mid 1960s, Walt Disney developed plans for a ski resort in Mineral King, a glacial valley in California's Sierra Nevada mountain range. He brought in experts such as the renowned Olympic ski coach and ski-area designer Willy Schaeffler, who helped plan a visitor village, ski runs and ski lifts among the several bowls surrounding the valley. Plans finally moved into action in the mid 1960s, but Walt died before the actual work started. Disney's death and opposition from conservationists ensured that the resort was never built.

Death

In 1966, Disney was scheduled to undergo surgery to repair an old neck injury caused by many years of playing polo at the Riviera Club in Hollywood. On November 2, during pre-operative X-rays, doctors at Providence St. Joseph Medical Center, across the street from the Disney Studio, discovered a tumor in his left lung. Five days later a biopsy showed the tumor to be malignant and to have spread throughout the entire left lung. After removal of the lung, doctors informed Disney that his life expectancy was six months to two years. After several chemotherapy sessions, Disney and his wife spent a short amount of time in Palm Springs, California. On November 30, Disney collapsed at his home. He was revived by fire department personnel and rushed to St. Joseph's where on December 15, 1966, at 9:30 a.m., ten days after his 65th birthday, Disney died of acute circulatory collapse, caused by lung cancer. The last thing he reportedly wrote before his death was the name of actor Kurt Russell, the significance of which remains a mystery, even to Russell.

Disney was cremated on December 17, 1966, and his ashes interred at the Forest Lawn Memorial Park in Glendale, California. Roy O. Disney continued out with the Florida project, insisting that the name be changed to Walt Disney World in honor of his brother.

The final productions in which Disney played an active role were the animated features ''The Jungle Book'' and ''Winnie the Pooh and the Blustery Day'', as well as the live-action musical comedy ''The Happiest Millionaire'', both released in 1967. Songwriter Robert B. Sherman recalled of the last time he saw Disney: }}

A long-standing urban legend maintains that Disney was cryogenically frozen, and his frozen corpse stored beneath the Pirates of the Caribbean ride at Disneyland. However, the first known cryogenic freezing of a human corpse did not occur until January 1967, more than a month after his death.

Legacy: 1967–present

Continuing Disney Productions

After Walt Disney's death, Roy Disney returned from retirement to take full control of Walt Disney Productions and WED Enterprises. In October 1971, the families of Walt and Roy met in front of Cinderella Castle at the Magic Kingdom to officially open the Walt Disney World Resort.

After giving his dedication for Walt Disney World, Roy asked Lillian Disney to join him. As the orchestra played "When You Wish Upon a Star", she stepped up to the podium accompanied by Mickey Mouse. He then said, "Lilly, you knew all of Walt's ideas and hopes as well as anybody; what would Walt think of it [Walt Disney World]?". "I think Walt would have approved," she replied. Roy died from a cerebral hemorrhage on December 20, 1971, the day he was due to open the Disneyland Christmas parade. During the second phase of the "Walt Disney World" theme park, EPCOT was translated by Disney's successors into EPCOT Center, which opened in 1982. As it currently exists, EPCOT is essentially a living world's fair, different from the actual functional city that Disney had envisioned. In 1992, Walt Disney Imagineering took the step closer to Disney's original ideas and dedicated Celebration, Florida, a town built by the Walt Disney Company adjacent to Walt Disney World, that hearkens back to the spirit of EPCOT. EPCOT was also originally intended to be devoid of Disney characters which initially limited the appeal of the park to young children. However, the company later changed this policy and Disney characters can now be found throughout the park, often dressed in costumes reflecting the different pavilions.

The Disney entertainment empire

Today, Walt Disney's animation/motion picture studios and theme parks have developed into a multi-billion dollar television, motion picture, vacation destination and media corporation that carry his name. Among other assets The Walt Disney Company owns five vacation resorts, eleven theme parks, two water parks, thirty-nine hotels, eight motion picture studios, six record labels, eleven cable television networks, and one terrestrial television network. As of 2007, the company had annual revenues of over U.S. $35 billion.

Disney Animation

Walt Disney was a pioneer in character animation. He was one of the first people to move away from basic cartoons with just ''"impossible outlandish gags"'' and crudely drawn characters to an art form with heartwarming stories and characters the audience can connect to on an emotional level. The personality displayed in the characters of his films and the technological advancements remain influential when animating today. He was also considered by many of his colleagues to be a master storyteller and the animation department did not fully recover from his demise until the late 1980's in a period known as the Disney Renaissance. The most finacially and critically successful films produced during this time include Who Framed Roger Rabbit (1988), The Little Mermaid (1989), Beauty and the Beast (1991), Aladdin (1992) and The Lion King (1994). In 1995 Walt Disney Pictures distributed Pixar's Toy Story, the first computer animated feature film. Walt Disney's nephew Roy E. Disney claimed that Walt would have loved ''Toy Story'' and that it was ''"his kind of movie"'' . With the rise of computer animated films a stream of financially unsuccessful Traditional hand-drawn animated features in the early 2000s emerged. This led to the company's controversial decision to close the traditional animation department. The two satellite studios in Paris and Orlando were closed, and the main studio in Burbank was converted to a computer animation production facility, firing hundreds of people in the process. In 2004, Disney released what was announced as their final "traditionally animated" feature film, ''Home on the Range''. However, since the 2006 acquisition of Pixar, and the resulting rise of John Lasseter to Chief Creative Officer, that position has changed with the largely successful 2009 film ''The Princess and the Frog''. This marked Disney's return to traditional hand-drawn animation and the studio hired back staff who had been laid-off in the past. Today Disney produces both traditional and computer animation.

CalArts

In his later years, Disney devoted substantial time to funding The California Institute of the Arts (CalArts). Formed in 1961 through a merger of the Los Angeles Conservatory of Music and the Chouinard Art Institute, which had helped in the training of the animation staff during the 1930s, when Disney died, one-fourth of his estate went to CalArts, which helped in building its campus. In his will, Disney paved the way for the creation of several charitable trusts which included one for the California Institute of the Arts and other for the Disney Foundation. He also donated of the Golden Oaks ranch in Valencia for construction of the school. CalArts moved onto the Valencia campus in 1972.

In an early admissions bulletin, Disney explained: }}

Walt Disney Family Museum

In 2009, the Walt Disney Family Museum opened in the Presidio of San Francisco. Thousands of artifacts from Disney's life and career are on display, including 248 awards that he received.

Anti-Semitism accusations

Disney was long rumored to be anti-Semitic during his lifetime, and such rumors have persisted after his death. Disney biographer Neal Gabler, the first writer to gain unrestricted access to the Disney archives, concluded in 2006 that available evidence does not support such accusations. In a CBS interview Gabler summarized his findings: }} Disney eventually distanced himself from the Motion Picture Alliance in the 1950s.

The Walt Disney Family Museum acknowledges that Disney did have "difficult relationships" with some Jewish individuals, and that ethnic stereotypes common to films of the 1930s were included in some early cartoons, such as ''Three Little Pigs''. However, the museum points out that Disney employed Jews throughout his career and was named "1955 Man Of The Year" by the B'nai B'rith chapter in Beverly Hills.

Academy Awards

Walt Disney holds the record for both the most Academy Award nominations (59) and the number of Oscars awarded (22). He also earned four honorary Oscars while his last competitive Academy Award was posthumous.

1932: Best Short Subject, Cartoons for: Flowers and Trees (1932)

1932: Honorary Award for: creation of Mickey Mouse.

1934: Best Short Subject, Cartoons for: Three Little Pigs (1933)

1935: Best Short Subject, Cartoons for: The Tortoise and the Hare (1934)

1936: Best Short Subject, Cartoons for: Three Orphan Kittens (1935)

1937: Best Short Subject, Cartoons for: The Country Cousin (1936)

1938: Best Short Subject, Cartoons for: The Old Mill (1937)

1939: Best Short Subject, Cartoons for: Ferdinand the Bull (1938)

1939: Honorary Award for ''Snow White and the Seven Dwarfs'' (1937) The citation read: ''"For Snow White and the Seven Dwarfs, recognized as a significant screen innovation which has charmed millions and pioneered a great new entertainment field"'' (the award was one statuette and seven miniature statuettes)

1940: Best Short Subject, Cartoons for: Ugly Duckling (1939)

1941: Honorary Award for: Fantasia (1940), shared with: William E. Garity and J.N.A. Hawkins. The citation for the certificate of merit read: ''"For their outstanding contribution to the advancement of the use of sound in motion pictures through the production of ''Fantasia''"''

1942: Best Short Subject, Cartoons for: Lend a Paw (1941)

1943: Best Short Subject, Cartoons for: Der Fuehrer's Face (1942)

1949: Best Short Subject, Two-reel for: Seal Island (1948)

1949: Irving G. Thalberg Memorial Award (Honorary Award)

1951: Best Short Subject, Two-reel for: Beaver Valley (1950)

1952: Best Short Subject, Two-reel for: Nature's Half Acre (1951)

1953: Best Short Subject, Two-reel for: Water Birds (1952)

1954: Best Documentary, Features for: The Living Desert (1953)

1954: Best Documentary, Short Subjects for: The Alaskan Eskimo (1953)

1954: Best Short Subject, Cartoons for: Toot Whistle Plunk and Boom (1953)

1954: Best Short Subject, Two-reel for: Bear Country (1953)

1955: Best Documentary, Features for: The Vanishing Prairie (1954)

1956: Best Documentary, Short Subjects for: Men Against the Arctic

1959: Best Short Subject, Live Action Subjects for: Grand Canyon

1969: Best Short Subject, Cartoons for: Winnie the Pooh and the Blustery Day

Other honors

Walt Disney was the inaugural recipient of a star on the Anaheim walk of stars awarded in recognition of his significant contribution to the city of Anaheim and specifically Disneyland, which is now the Disneyland Resort. The star is located at the pedestrian entrance to the Disneyland Resort on Harbor Boulevard. Disney has two stars on the Hollywood Walk of Fame, one for motion pictures and the other for his television work.

Walt Disney received the Congressional Gold Medal on May 24, 1968 (P.L. 90-316, 82 Stat. 130–131) and the Légion d'Honneur awarded by France in 1935. In 1935, Walt received a special medal from the League of Nations for creation of Mickey Mouse, held to be Mickey Mouse award. He also received the Presidential Medal of Freedom on September 14, 1964. On December 6, 2006, California Governor Arnold Schwarzenegger and First Lady Maria Shriver inducted Walt Disney into the California Hall of Fame located at The California Museum for History, Women, and the Arts.

A minor planet, 4017 Disneya, discovered in 1980 by Soviet astronomer Lyudmila Georgievna Karachkina, is named after him.

The Walt Disney Concert Hall in Los Angeles, California, opened in 2003, was named in his honor.

In 1993, HBO began development of a Walt Disney biopic directed by Frank Pierson and featuring Lawrence Turman but the project never materialized and was soon abandoned. However, ''Walt - The Man Behind the Myth'', a biographical documentary about Disney, was later made.

See also

Disney family

The Mickey Mouse Club

The Walt Disney Family Museum

Walt Disney anthology television series

Notes

References

Further reading

Barrier, Michael (1999). ''Hollywood Cartoons: American Animation in Its Golden Age''. Oxford: Oxford University Press. ISBN 0-19-516729-5.

Broggie, Michael (1997, 1998, 2005). ''Walt Disney's Railroad Story''. Virginia Beach, Virginia. Donning Publishers. ISBN 1-56342-009-0

Eliot, Marc (1993). ''Walt Disney: Hollywood's Dark Prince''. Carol. ISBN 1-55972-174-X

Mosley, Leonard. ''Disney's World: A Biography'' (1985, 2002). Chelsea, MI: Scarborough House. ISBN 0-8128-8514-7.

Gabler, Neal. ''Walt Disney: The Triumph of American Imagination'' (2006). New York, NY. Random House. ISBN 0-679-43822-X

Schickel, Richard, and Dee, Ivan R. (1967, 1985, 1997). ''The Disney Version: The Life, Times, Art and Commerce of Walt Disney''. Chicago: Ivan R. Dee, Publisher. ISBN 1-56663-158-0.

Sherman, Robert B. and Sherman, Richard M. (1998) "Walt's Time: From Before to Beyond" ISBN 0-9646059-3-7

Watts, Steven, ''The Magic Kingdom: Walt Disney and the American Way of Life'', University of Missouri Press, 2001, ISBN 0826213790

External links

Discusses Walt Disney's attitude towards unions and communism.

Walt Disney Family Museum

Neal Gabler, Inside Walt Disney

Interview with Robert Stack About Walt Disney's Involvement in Polo

Walt Disney Gravesite

Disney's Fantastic Voyage

History of Walt Disney

Category:1901 births Category:1966 deaths Category:American animators Category:American anti-communists Category:American cartoonists Category:American Congregationalists Category:American Christians Category:American entertainment industry businesspeople Category:American film directors Category:American film producers Category:American screenwriters Category:American television personalities Category:American voice actors Category:Animated film directors Category:Burials at Forest Lawn Memorial Park (Glendale) Category:California Republicans Category:Cancer deaths in California Category:Congressional Gold Medal recipients Category:Deaths from lung cancer Category:Disney comics writers Category:Disney people Category:English-language film directors Category:Film studio executives Category:American artists of German descent Category:American writers of German descent Category:Illinois Republicans Category:American writers of Irish descent Category:American people of Canadian descent Category:American people of English descent Category:American people of French descent Category:Kansas City Art Institute alumni Category:National Inventors Hall of Fame inductees Category:People from Chicago, Illinois Category:Presidential Medal of Freedom recipients Category:School of the Art Institute of Chicago alumni Category:Animated film producers

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