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5 Cards in this Set

  • Front
  • Back
What are asteroids made mostly of?
hard, mostly solid, rock
comets
ice, more speed than asteroids
How many Earth's can you put across Jupiter?
about 10
mercury
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
maria
Gallelio thought that they looked like seas or oceans, that is Italian for sea or ocean