the solar system

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Across
  1. 4. (n)it goes around planet earth
  2. 6. (n)a force that pulls us to the ground
  3. 7. (v)to go around
  4. 8. (n)something we use to look at the stars
Down
  1. 1. (n)the _____ is a star, because it gives out light
  2. 2. (adj)too many to count
  3. 3. (adj)we can't see stars when lights in the city are too ______
  4. 5. (adj)the _____ hole is a place that pulls everything inside, even light
  5. 9. (n)there are 9 ______s in the solar system