The Universe

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Across
  1. 2. a collection of stars
  2. 8. everything!
  3. 9. layer of gas
  4. 12. a star and orbiting planets
  5. 13. the force that pulls everything together
Down
  1. 1. an object that orbits a planet
  2. 3. ball of gas that gives out light
  3. 4. has a tail
  4. 5. a planet that is a large gas ball
  5. 6. hypothesis on the origins of the universe.
  6. 7. a dwarf planet
  7. 10. usually has irregular shape
  8. 11. we have one of these