Ethan Space

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Across
  1. 3. Planet does not have enough gravity to clean it's dirt
  2. 6. inner planets
  3. 8. often own as dirty snowballs
  4. 9. outer planets
  5. 10. celestial body that orbits a planet
Down
  1. 1. observed mars and developed a model of the solar system
  2. 2. first to use a telescope and report what he saw
  3. 4. pieces of rock floating in space
  4. 5. small bodies in a left over formation
  5. 7. 3 laws of motion