Solar System

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Across
  1. 2. axis tilted on its side
  2. 4. the envelope of gases surrounding the Earth or another planet
  3. 7. the elliptical path of planets
  4. 8. the largest planet
  5. 9. planets are mostly made up of gas
  6. 10. the period of time it takes a planet to go around the sun
  7. 12. the spinning of a planet on its axis
  8. 14. closet planet to the sun
  9. 16. hottest planet
  10. 17. great dark spot
Down
  1. 1. 2/3 of the surface covered by water
  2. 3. another word for a moon orbiting a planet
  3. 5. "the Red Planet"
  4. 6. gas planet with visible rings
  5. 11. planets are also called terrestrial planets
  6. 13. a natural force of attraction exerted by one object on another object
  7. 15. bowl-shaped cavity on the surface of the planet