Five-dimensional space

A five-dimensional space is a space with five dimensions. If interpreted physically, that is one more than the usual three spatial dimensions and the fourth dimension of time used in relativitistic physics. It is an abstraction which occurs frequently in mathematics, where it is a legitimate construct. In physics and mathematics, a sequence of N numbers can be understood to represent a location in an N-dimensional space. Whether or not the actual universe in which we live is five-dimensional is a topic of debate.

Physics

Much of the early work on five dimensional space was in an attempt to develop a theory that unifies the four fundamental forces in nature: strong and weak nuclear forces, gravity and electromagnetism. German mathematician Theodor Kaluza and Swedish physicist Oskar Klein independently developed the Kaluza–Klein theory in 1921, which used the fifth dimension to unify gravity with electromagnetic force. Although their approaches were later found to be at least partially inaccurate, the concept provided a basis for further research over the past century.

List of minor planets: 13001–14000

Moon

The Moon (in Greek: σελήνη Selene, in Latin: Luna) is Earth's only natural satellite. It is one of the largest natural satellites in the Solar System, and, among planetary satellites, the largest relative to the size of the planet it orbits (its primary). It is the second-densest satellite among those whose densities are known (after Jupiter's satellite Io).

The Moon is thought to have formed approximately 4.5 billion years ago, not long after Earth. There are several hypotheses for its origin; the most widely accepted explanation is that the Moon formed from the debris left over after a giant impact between Earth and a Mars-sized body called Theia.

The Moon is in synchronous rotation with Earth, always showing the same face with its near side marked by dark volcanic maria that fill between the bright ancient crustal highlands and the prominent impact craters. It is the second-brightest regularly visible celestial object in Earth's sky after the Sun, as measured by illuminance on Earth's surface. Although it can appear a very bright white, its surface is actually dark, with a reflectance just slightly higher than that of worn asphalt. Its prominence in the sky and its regular cycle of phases have, since ancient times, made the Moon an important cultural influence on language, calendars, art, and mythology.

Natural satellite

A natural satellite is a celestial body that orbits another celestial body of greater mass (e.g., a planet, star, or dwarf planet), which is called its primary. For example, the Moon is a natural satellite of Earth, and Earth is a natural satellite of the Sun.

In the Solar System there are 173 known natural satellites which orbit within 6 planetary satellite systems. In addition, several other objects are known to have satellites, including three IAU-listed dwarf planets: Pluto, Haumea, and Eris.As of January 2012, over 200 minor-planet moons have been discovered. There are 76 known objects in the asteroid belt with satellites (five with two each), four Jupiter trojans, 39 near-Earth objects (two with two satellites each), and 14 Mars-crossers. There are also 84 known natural satellites of trans-Neptunian objects. Some 150 additional small bodies have been observed within the rings of Saturn, but only a few were tracked long enough to establish orbits. Planets around other stars are likely to have satellites as well, and although numerous candidates have been detected to date, none have yet been confirmed.

Moon (disambiguation)

The Moon is Earth's only natural satellite.

Moon may also refer to:

Celestial bodies

Places

People

Nicknames

Entertainment and media

Film

Literature and publications

20 Below

20 Below is the second album by MC Breed. It was released on May 12, 1992 for Wrap Records and was produced by Bernard Terry and DJ Flash. Though not as successful as his previous album, 20 Below made it to three Billboard charts, #155 on the Billboard 200, #40 on the Top R&B/Hip-Hop Albums and #6 on the Top Heatseekers. Two singles from the album made it to the Hot Rap Singles chart, "Ain't to Be Fucked With" made it to #14, while "Ain't Too Much Worried" made it to #12.

Track listing

References

Eight Below

Eight Below is a 2006 American adventure drama film based on Antarctica by Toshirô Ishidô, Koreyoshi Kurahara, Tatsuo Nogami and Susumu Saji. It was produced by Patrick Crowley and David Hoberman, directed by Frank Marshall with music by Mark Isham and written by David DiGilio. It stars Paul Walker, Bruce Greenwood, Moon Bloodgood, and Jason Biggs. It was released theatrically on February 17, 2006, by Walt Disney Pictures in the United States. The film is set in Antarctica, but was filmed in Svalbard, Norway, Greenland, and British Columbia, Canada. The film received positive reviews from critics and it earned $120.4 million on a $40 million budget.

Plot

In 1993, Jerry Shepard (Paul Walker) is a guide at an Antarctica research base under contract with the National Science Foundation. UCLA professor, Dr. Davis McClaren (Bruce Greenwood), arrives at the base. He presses Shepard to take him to Mount Melbourne to attempt to find a rare meteorite from the planet Mercury. Shepard does so, ignoring his own intuition, which tells him it is too late in the season to complete such a treacherous route, and decides that the only way to get to Mount Melbourne is by dog sled.