Posted on: 09 Feb, 2006
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December 2006 Calendar - Global Callisto in Color
NASA/JPL/ DLR(German Aerospace Center)Download full size image
Bright scars on a darker surface testify to a long history of impacts on Jupiter's moon Callisto in this image of Callisto from NASA's Galileo spacecraft. The picture, taken in May 2001, is the only complete global color image of Callisto obtained by Galileo, which began orbiting Jupiter in 1995. Of Jupiter's four largest moons, Callisto orbits farthest from the giant planet. Callisto's surface is uniformly cratered but is not uniform in color or brightness. Scientists believe the brighter areas are mainly ice and the darker areas are highly eroded, ice-poor material.
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The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' (I've found it!), but 'That's funny...' - Isaac Asimov
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Phobos, one of the moons of Mars, is so close to its parent planet that it could not be seen by an observer standing at either of Mars poles. Phobos make three complete orbits around Mars every day.Word of the Day
filch
Pronunciation: /fillch/
v : to steal something small or of little value
"To filch from friends and relatives is the mark of a coward."
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