Rotational Period

COMET ISON: New Rotational Period for ISON

Order: Reorder
Duration: 1:48
Updated: 30 Nov 2013

COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON COMET ISON: New Rotational Period for ISON This is the latest I.Ferrins update.Visit: http://astronomia.udea.edu.co/cometspage/ STEREO BEHIND COR2 show the comet rotating *before reaching perihelion*. I have analyzed these images and from three minimum and two maximum I find the following periods of rotation: 2.42, 2.33, 2.42 and 2.35 hours. The mean value is 2.38+-0.05 hours. Images from STEREO BEHIND COR2 show the comet rotating. It is possible to measure a rotational period for the comet and the result is 2.38+-0.05 hours. We can reach the following conclusions: (1) Since these measurements were made well before perihelion tidal forces were not the cause of split. (2) Weidenschilling (1981) gives a "limit of rotational instability" of P(limit)=3.3 h SQRT(1/rho) for a spherical body, where rho is the density. It is believed that the density of a comet is between 0.6 and 1.0 gm/cm3, thus the rotational stability limit is between 3.3 and 4.2 hours. The observed rotational limit of ISON is 2.38 hours, thus the comet has exceeded the limit of rotational stability, and the reason of fragmentation was "rotational breakup". Reference: Weidenschilling, S. J., 1981. How fast can an asteroid spin? Icarus, 46, 124-126. I.FERRIN - THE COMETS PAGE http://astronomia.udea.edu.co/cometspage/ROTATIONAL2.xhtml http://astronomia.udea.edu.co/cometspage/ http://arxiv.org/find/astro-ph/1/au:+Ferrin_I/0/1/0/all/0/1 HUBBLESITE/ISON BLOG http://hubblesite.org/hubble_discoveries/comet_ison CIOC http://www.isoncampaign.org/karl/schroedingers-comet Perihelion & Distance: LIVE Information http://www.cometison2013.co.uk/perihelion-and-distance/ Music credit: The Godfather - Soundtrack played live on tyros 4 - youtube channel "Telmo Gama" W-r_qu8hwdY

http://wn.com/COMET_ISON_New_Rotational_Period_for_ISON

Asteroid 2004MN4 99942 - Rotational Period - Orbital View

Order: Reorder
Duration: 0:24
Updated: 20 Oct 2013

Facebook - https://www.facebook.com/planetarydefensefoundation Twitter - https://www.twitter.com/victorlortiz Official Website- https://sites.google.com/site/planetarydefensefoundation/

http://wn.com/Asteroid_2004MN4_99942_Rotational_Period_Orbital_View

Earth & Jupiter Rotation Rates Compared [HD]

Order: Reorder
Duration: 0:12
Updated: 05 Jul 2013

This animation illustrates the difference in the rotational period between the Earth and Jupiter. Earth rotates once in 24 hours; whereas, Jupiter rotates mo...

http://wn.com/Earth_Jupiter_Rotation_Rates_Compared_HD_

Mars Rotation - HQ

Order: Reorder
Duration: 1:58
Updated: 08 Jul 2013

Mars Rotation - High Quality Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is also ref...

http://wn.com/Mars_Rotation_HQ

Hubble Views Ceres Rotation (2003-2004)

Order: Reorder
Duration: 0:15
Updated: 26 Apr 2012

The Hubble Space Telescope's Advanced Camera for Surveys studied the asteroid Ceres for a full nine-hour rotational period between December 2003 and January ...

http://wn.com/Hubble_Views_Ceres_Rotation_2003-2004

Synchronous Rotation of the Moon

Order: Reorder
Duration: 2:19
Updated: 19 Aug 2013

Why does the same side of the Moon always face the Earth? The Moon has synchronous rotation: it's rotation period is the same as its period of revolution. Ea...

http://wn.com/Synchronous_Rotation_of_the_Moon

Mars Rotation

Order: Reorder
Duration: 1:01
Updated: 02 Jul 2013

Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is also referred to as the "Red Planet" ...

http://wn.com/Mars_Rotation

Earth Rotation Slowing down

Order: Reorder
Duration: 0:52
Updated: 08 Aug 2013

Effects of moon's gravity Because the Moon's mass is a considerable fraction of that of the Earth (about 1:81), the two bodies can be regarded as a double pl...

http://wn.com/Earth_Rotation_Slowing_down

Rotation, Seasons and Surface of Planet Mars

Order: Reorder
Duration: 3:04
Updated: 08 Feb 2013

http://www.FreeScienceLectures.com Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is al...

http://wn.com/Rotation,_Seasons_and_Surface_of_Planet_Mars

Uniform Circular Motion - Period Frequency and Rotational Velocity Q3

Order: Reorder
Duration: 0:21
Updated: 25 Mar 2013

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http://wn.com/Uniform_Circular_Motion_Period_Frequency_and_Rotational_Velocity_Q3

Uniform Circular Motion - Period Frequency and Rotational Velocity Q5

Order: Reorder
Duration: 1:02
Updated: 25 Mar 2013

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http://wn.com/Uniform_Circular_Motion_Period_Frequency_and_Rotational_Velocity_Q5

Asynchronous Magnetic Bead Rotation for Single Cell Detection and Growth

Order: Reorder
Duration: 0:35
Updated: 13 Oct 2012

The asynchronous rotational period is very sensitive to changes in drag. As a result, when bacteria attach to the particle and grow there are significant cha...

http://wn.com/Asynchronous_Magnetic_Bead_Rotation_for_Single_Cell_Detection_and_Growth

Orbital Period of the Sun in the Milky Way

Order: Reorder
Duration: 7:06
Updated: 05 Aug 2013

I use our knowledge of the Milky Way rotation speed and our location to work out what the period is for the sun's orbit in the galaxy.

http://wn.com/Orbital_Period_of_the_Sun_in_the_Milky_Way

Physics example pendulum simple harmonic motion rotational.avi

Order: Reorder
Duration: 15:55
Updated: 22 Apr 2013

Determine how long a pendulum must be to have a period (time to travel one swing over and back) of a specified time. Uses Newton's second law for rotational ...

http://wn.com/Physics_example_pendulum_simple_harmonic_motion_rotationalavi

Uniform Circular Motion - Rotational Velocity

Order: Reorder
Duration: 2:02
Updated: 18 Mar 2013

Uniform Circular Motion Presentation - https://njctl.org/courses/science/algebra-based-physics/uniform-circular-motion/uniform-circular-motion-presentation-2...

http://wn.com/Uniform_Circular_Motion_Rotational_Velocity

Comet ISON: Many JETS Create HAVOC - WHY Comet ISON is Not Breaking Up ?

Order: Reorder
Duration: 6:20
Updated: 24 Nov 2013

http://astronomia.udea.edu.co/cometspage/WHYISONISNOT.xhtml Why is comet ISON not disintegrating? There are two reasons. (1) The comet is a slow rotator, thus the powerfull centrifugal forces are not at play. This conclusion is supported by the slow rotational period of 15.7 hours that I found for the comet. And (2) the comet is large, much larger than other comets that disintegrated. So gravity is holding it together. NASA researchers estimated that the nucleus is less than 4 km in diameter. From our own model calculations, the comet is even larger. Many images have been published in Internet applying new processing techniques, that bring out the inner region of the coma, and invariably show from 1 to 7 jets of matter spouting out of the nucleus. Due to Newton's third law, these jets exert powerfull forces on the nucleus. They not only change the orbit of the comet, but also change the orientation of the rotational pole. In other words, they create havoc on the normal parameters of the comet. Thus comet ISON continues surprising us. And the final surprise would be if it gets in one piece to perihelion and survives in one piece after perihelion. If it does, we will be in the presence of a comet that has broken all records, all predictions and all paradigms, and that will become if not "the comet of the century" (we are only 13 years into the century), at least the "The Great Comet of the Beginning of the Century". Ignacio Ferrín, 131125 http://astronomia.udea.edu.co/cometspage/WHYISONISNOT.xhtml

http://wn.com/Comet_ISON_Many_JETS_Create_HAVOC_WHY_Comet_ISON_is_Not_Breaking_Up_?

The Solar Dynamo: Plasma Flows

Order: Reorder
Duration: 1:00
Updated: 13 Jan 2013

In this visualization, we illustrate the fluid flows in the Sun which drive the solar magnetic dynamo. The flows can be considered as a combination of two co...

http://wn.com/The_Solar_Dynamo_Plasma_Flows

Animation of "Blind Search" of Fermi Space Telescope data

Order: Reorder
Duration: 0:59
Updated: 04 May 2012

This animation illustrates how analysis of Fermi data reveals new pulsars. Fermi's LAT records the precise arrival time and approximate direction of the gamm...

http://wn.com/Animation_of_Blind_Search_of_Fermi_Space_Telescope_data

Hubble Makes Movie of Neptune's Dynamic Atmosphere

Order: Reorder
Duration: 0:40
Updated: 22 Jun 2013

On April 29 and 30, 2005, Hubble images were taken every 4-5 hours, spaced at about a quarter of Neptune's rotational period. These where combined to create ...

http://wn.com/Hubble_Makes_Movie_of_Neptune's_Dynamic_Atmosphere

Mars, our Red Neighbor

Order: Reorder
Duration: 5:19
Updated: 30 Jul 2013

Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the "Re...

http://wn.com/Mars,_our_Red_Neighbor

Planet Mars: The New Evidence - Documentary

Order: Reorder
Duration: 44:03
Updated: 20 Aug 2013

Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Named after the Roman god of war, it is often described as the "Re...

http://wn.com/Planet_Mars_The_New_Evidence_Documentary

Mars Exploration

Order: Reorder
Duration: 7:11
Updated: 25 Jun 2013

Exploration of planet Mars, from early time up to Vicking Landing. Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars...

http://wn.com/Mars_Exploration

Millisecond Pulsar with Magnetic Field Structure

Order: Reorder
Duration: 0:25
Updated: 25 Sep 2013

This animation illustrates how an old pulsar in a binary system can be reactivated -- and sped up to a millisecond spin -- by accreting gas from its companion star. A pulsar is a rapidly rotating neutron star that emits pulses of radiation (such as X-rays and radio waves) at regular intervals. A millisecond pulsar is one with a rotational period between 1 and 10 milliseconds, or from 60,000 to 6,000 revolutions per minute. Pulsars form in supernova explosions, but even newborn pulsars don't spin at millisecond speeds, and they gradually slow down with age. If, however, a pulsar is a member of a binary system with a normal star, gas transferred from the companion can spin up an old, slow pulsar to the millisecond range. For more information, go to http://www.nasa.gov/content/goddard/astronomers-uncover-a-transformer-pulsar This video is public domain and can be downloaded at: http://svs.gsfc.nasa.gov/vis/a010000/a010100/a010144/

http://wn.com/Millisecond_Pulsar_with_Magnetic_Field_Structure

COMET ISON: New Rotational Period for ISON

Asteroid 2004MN4 99942 - Rotational Period - Orbital View

Earth & Jupiter Rotation Rates Compared [HD]

Mars Rotation - HQ

Hubble Views Ceres Rotation (2003-2004)

Synchronous Rotation of the Moon

Mars Rotation

Earth Rotation Slowing down

Rotation, Seasons and Surface of Planet Mars

Uniform Circular Motion - Period Frequency and Rotational Velocity Q3

Uniform Circular Motion - Period Frequency and Rotational Velocity Q5

Asynchronous Magnetic Bead Rotation for Single Cell Detection and Growth

Orbital Period of the Sun in the Milky Way

Physics example pendulum simple harmonic motion rotational.avi

Make changes yourself !

COMET ISON: New Rotational Period for ISON

Asteroid 2004MN4 99942 - Rotational Period - Orbital View

Earth & Jupiter Rotation Rates Compared [HD]

Mars Rotation - HQ

Hubble Views Ceres Rotation (2003-2004)

Synchronous Rotation of the Moon

Mars Rotation

Earth Rotation Slowing down

Rotation, Seasons and Surface of Planet Mars

Uniform Circular Motion - Period Frequency and Rotational Velocity Q3

Uniform Circular Motion - Period Frequency and Rotational Velocity Q5

Asynchronous Magnetic Bead Rotation for Single Cell Detection and Growth

Orbital Period of the Sun in the Milky Way

Physics example pendulum simple harmonic motion rotational.avi

Uniform Circular Motion - Rotational Velocity

Comet ISON: Many JETS Create HAVOC - WHY Comet ISON is Not Breaking Up ?

The Solar Dynamo: Plasma Flows

Animation of "Blind Search" of Fermi Space Telescope data