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How to Cook a Comet

A comet's journey through the solar syste is perilous and violent. Before it reaches Mars - at some 230 million miles away from the sun - the radiation of the sun begins to cook off the frozen water ice directly into gas. This is called sublimation. It is the first step toward breaking the comet apart. If it survives this, the intense radiation and pressure closer to the sun could destroy it altogether.

Animators at NASA's Goddard Space Flight Center in Greenbelt, Md. created this short movie showing how the sun can cook a comet.

Such a journey is currently being made by Comet ISON. It began its trip from the Oort cloud region of our solar system and is now traveling toward the sun. The comet will reach its closest approach to the sun on Thanksgiving Day -- Nov. 28, 2013 -- skimming just 730,000 miles above the sun's surface. If it comes around the sun without breaking up, the comet will be visible in the Northern Hemisphere with the naked eye, and from what we see now, ISON is predicted to be a particularly bright and beautiful comet.

Even if the comet does not survive, tracking its journey will help scientists understand what the comet is made of, how it reacts to its environment, and what this explains about the origins of the solar system. Closer to the sun, watching how the comet and its tail interact with the vast solar atmosphere can teach scientists more about the sun itself.

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Other multimedia items related to this story:
     Kreutz Comet Orbits (id 4018)
     Chasing Comet ISON (id 4098)
     Sungrazers Galore (id 11156)
     Sun Grazing Comets as Solar Probes (id 11158)
     The Path of Comet ISON (id 11222)
     What is a Sungrazing Comet? (id 11307)

Watch this video on the Goddard YouTube channel .   

Watch this video on the Goddard YouTube channel.

Duration: 2.0 minutes
Available formats:
  320x240 (29.97 fps) MPEG-4   11 MB
  640x360 (29.97 fps) MPEG-4   23 MB
  1280x720 (59.94 fps) QT         1 GB
  1280x720 (29.97 fps) WMV         35 MB
  1280x720 (59.94 fps) QT         1 GB
  1920x1080 (29.97 fps) QT         45 MB
  720x480 (29.97 fps) WMV         18 MB
  1920x1080 (59.94 fps) QT         583 MB
  1920x1080 (29.97 fps) QT         45 MB
  1280x1080 JPEG         39 KB
  960x540 (29.97 fps) WEBM         7 MB
  320x180     JPEG         16 KB
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Animation Number:11384
Animators:Walt Feimer (HTSI) (Lead)
 Genna Duberstein (USRA)
Video Editor:Genna Duberstein (USRA)
Narrator:Chris Meaney (HTSI)
Producer:Genna Duberstein (USRA)
Scientist:Karl Battams (Naval Research Laboratory)
Goddard TV Tape:G2013-083 -- How To Cook a Comet
Please give credit for this item to:
NASA's Goddard Space Flight Center
SVS >> Comet
SVS >> Solar Ultraviolet
SVS >> Solar Wind
SVS >> Sun
SVS >> Heliophysics
DLESE >> Narrated
SVS >> Corona
NASA Science >> Sun
NASA Science >> Planets and Moons
SVS >> Coma

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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version logo - the U.S. Government's official Web portal. + Privacy Policy and Important Notices
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