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Дата изменения: Thu Dec 29 11:03:14 2005
Дата индексирования: Sun Feb 3 11:32:16 2013
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Поисковые слова: ультрафиолетовое излучение
APOD: 2005 December 28- Smooth Sections on Asteroid Itokawa
Astronomy Picture of the Day
    


APOD: 2005 December 28- Smooth Sections on Asteroid Itokawa
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APOD: 2005 December 28-  Smooth Sections on Asteroid Itokawa
Credit & Copyright: ISAS, JAXA
Explanation: What are parts of this asteroid's surface so smooth? No one is yet sure, but it may have to do with the dynamics of an asteroid that is a loose pile of rubble rather than a solid rock. The unusual asteroid is currently being visited by the Japanese spacecraft Hayabusa that is documenting its unusual structure and mysterious lack of craters. Last month, Hayabusa actually touched down on one of the smooth patches, dubbed the MUSES Sea, and collected soil samples that will eventually be returned to Earth for analysis. Unfortunately, the robot Hayabusa craft has been experiencing communications problems and so its departure for Earth has been delayed until 2007. Computer simulations show that asteroid 500-meter asteroid Itokawa may impact the Earth within the next few million years.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Based on Astronomy Picture Of the Day

Publications with keywords: asteroid
Publications with words: asteroid
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