August 14th, 2003, 03:49 PM
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Colonel
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Join Date: Mar 2002
Location: Colorado
Posts: 1,727
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Re: Mapping Sol
Look here.
Mercury
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Mercury is the closest planet to the Sun and the eighth largest. Mercury is smaller in diameter than Ganymede and Titan but more massive.
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Asteriods
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The total mass of all the asteroids is less than that of the Moon.
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Ceres is not as large or larger than Pluto. It is just barely large enough to have been rendered spherical and close enough to earth to have been clearly seen long enough ago for them to have originally thought it to be a planet. It has a raduis of 466 km.
Jupiter
Jupiter has four large moons, Io, Europa, Ganymede and Calisto. All except Io should be Ice. All Ice moons are believed to have a rocky core, but are icy on the surface (even Gas Giants have a rocky core).
Jupiter has no mid-sized moons.
Saturn
Saturn has one large moon, Titan. Titan has a radius of 2,575 km.
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Titan is about half water ice and half rocky material. It is probably differentiated into several layers with a 3400 km rocky center surrounded by several layers composed of different crystal forms of ice....
It is composed primarily of molecular nitrogen (as is Earth's) with no more than 6% argon and a few percent methane.
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Saturn also has five mid-sized moons between 260 km and 765 km in radius.
Uranus
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Uranus' atmosphere is about 83% hydrogen, 15% helium and 2% methane....
Uranus' blue color is the result of absorption of red light by methane in the upper atmosphere.
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Uranus has four mis-sezed moons from 236 km to 789 km radius, I do not think they'd even qualify as Tiny.
Neptune
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Neptune's composition is probably similar to Uranus': various "ices" and rock with about 15% hydrogen and a little helium. Like Uranus, but unlike Jupiter and Saturn, it may not have a distinct internal layering but rather to be more or less uniform in composition. But there is most likely a small core (about the mass of the Earth) of rocky material. Its atmosphere is mostly hydrogen and helium with a small amount of methane.
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Neptune has one large moon, Triton, which is icy. It also has one mid-sized moon, Proteus, with a radius of 209 km.
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