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Tired of the same old planets? Mars just isn't red enough for you? Why not Build Your Own Solar System and find out if life could exist there!



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    Did you know that Mercury has a higher percentage of iron than any other known planet? More...
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    Created by Dr. Douglas P. Hamilton and students at U. Maryland. We gratefully acknowledge support from NASA (2003-present) and NSF (1998-2003). About Us