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Дата изменения: Mon Aug 18 10:17:23 2003
Дата индексирования: Sat Apr 26 19:55:16 2008
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Dark Volcano Active on Io
Astronomy Picture of the Day
    


Dark Volcano Active on Io
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Dark Volcano Active on Io
Credit: Galileo Project, JPL, NASA
Explanation: The surface of Io is changing even as we watch. The inset frame of Jupiter's most active moon was taken by the robot spacecraft Galileo in April. Just last month the larger image was taken. The new large black spot reveals that a volcano named Pillan Patera has been erupting during the interim. A vast moonscape roughly the size of Arizona has just been covered by some dark material. What is this material? It's composition remains unknown although it is certainly different in color from the red material seen surrounding volcano Pele on the upper left.

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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: Jupiter - Io - volcano
Publications with words: Jupiter - Io - volcano
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