Callisto is a moon of the planet Jupiter, discovered in 1610 by Galileo Galilei. It is the third-largest moon in the Solar System and the second largest in the Jovian system, after Ganymede. It does not form part of the orbital resonance that affects three inner Galilean satellites—Io, Europa and Ganymede—and thus does not experience appreciable tidal heating. Callisto rotates synchronously with its orbital period, so the same face is always turned toward Jupiter. Callisto is composed of approximately equal amounts of rock and ices, with a mean density of about 1.83 g/cm3. Compounds detected spectrally on the surface include water ice, carbon dioxide, silicates, and organic compounds. Investigation by the Galileo spacecraft revealed that Callisto may have a small silicate core and possibly a subsurface ocean of liquid water at depths greater than 100 km. Prominent surface features include multi-ring structures, variously shaped impact craters, and chains of craters and associated scarps, ridges and deposits. Callisto is surrounded by an extremely thin atmosphere composed of carbon dioxide and probably molecular oxygen, as well as by a rather intense ionosphere. (more...)
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I've chased main -force units all over the country, and the impact was zilch. It meant nothing to the people. Unless a more positive and more stirring theme ...
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zfly9
Wed, 17 Feb 2010 18:40:28 GM
I always check the . main page. for the newest posts at the bottom of the front . page. . I rarely check into each section fo the forum unless I am trying to.
Q. I want to get to my avatar but on the main page of yahoo it doesnt have it.
Asked by XomotorchickoX - Sun Feb 25 14:04:53 2007 - - 6 Answers - 0 Comments
A. You're right, it is pretty hard to find. You can get there directly by going to There's also a link to 'Edit my Yahoo! avatar' in the 'Picture' section of the Answers 'Edit My Profile' page.
Answered by jonathanhstrauss - Sun Feb 25 14:09:21 2007
