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I don't think the objects in the asteroid belt ever made up a planet. I once read that Mars' and Jupiter's gravity was the reason a planet failed to form there.

About Mars, I also read that the Hellas impact forced up the Tharsis Bulge and the stretching of the crust ripped open the Mariner Valley. I don't know if this is the generally accepted theory, though.

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Shattered planet 716 scimitar 04-Feb-04 10:46
Re: Shattered planet 268 Diomede 04-Feb-04 19:28
Re: Shattered planet 252 Zosimos 04-Feb-04 20:02
Re: Shattered planet 252 Diomede 05-Feb-04 00:24
Re: Shattered planet 246 Zosimos 05-Feb-04 01:50
Re: Scars 264 Thunderbird 05-Feb-04 05:39
Re: Shattered planet 242 Geoff 05-Feb-04 03:15
Re: Shattered planet 246 Mercury Rapids 05-Feb-04 09:51
Re: Shattered planet 294 scimitar 05-Feb-04 10:37
Re: Shattered planet 426 Brew99 10-Feb-04 05:05

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