Astronomy

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Across
  1. 2. Spinning on an axis
  2. 4. Where we live
  3. 6. Has different phases depending on where it is around the Earth.
  4. 8. What revolves around the sun
  5. 10. The idea the earth is the center of everything
  6. 14. The inner planets
  7. 16. Too many and too small to be a planet
  8. 17. Has different phases depending on where it is in space
  9. 18. The ball of rock and ice flying though the solar system
  10. 20. The outer planets
Down
  1. 1. The idea the sun is the center of the solar system
  2. 3. The force that pulls objects to the ground
  3. 5. What everything is in
  4. 7. Where the sun, planets, and smaller rocks are.
  5. 9. When one object blocks out another.
  6. 11. A group of stars
  7. 12. When one object moves around another.
  8. 13. An idea to explain the universe's creation
  9. 15. What the sun is
  10. 19. The center of the solar system