Solar System

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Across
  1. 5. rotates around an axis or center
  2. 7. Zone not to hot and not to cold so liquid water can exist on a planet
  3. 9. rocky material that orbits the sun
  4. 12. attractive force between objects that have mass
  5. 13. organism that exists in an extreme environment
  6. 14. enters earth atmosphere and produces a streak of light
  7. 16. made of rock, ice and gas material that orbits the sun
Down
  1. 1. Mercury,Venus,Earth,Mars
  2. 2. object naturally object that exists in space and is observed by astronomers
  3. 3. tendency of an object in motion to resist change
  4. 4. belt small celestial body beyond neptunes orbit
  5. 6. Saturn,Jupiter,Neptune,Uranus
  6. 8. body orbiting a planet
  7. 10. The sun together with a group of celestial bodies
  8. 11. an object moving around another object
  9. 15. how hard it is to stop a moving object