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5 Cards in this Set
- Front
- Back
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What are asteroids made mostly of?
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hard, mostly solid, rock
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comets
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ice, more speed than asteroids
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How many Earth's can you put across Jupiter?
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about 10
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mercury
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helped prove Einstein's theory of relativity; 3 days in two years; most elliptical of all planets except pluto; not as heavy, smaller than earth, temperatures are extremes whethere you are in the sun or at night-no atmosphere-doesn't reflect much light; 88 days to go around sun 1 time; one of the most heavily cratered objects in the solar system; looks kinda like moon
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maria
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Gallelio thought that they looked like seas or oceans, that is Italian for sea or ocean
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