Astroical terms

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Across
  1. 3. what keeps us on the ground
  2. 4. entry from the sun
  3. 5. the way the earth was created
  4. 7. a Collision between two objects in space
  5. 8. a round ball where we live
  6. 10. burnig gas
  7. 11. snowballs in space
Down
  1. 1. a place in space where light can not escape
  2. 2. 12pm
  3. 3. billions of starts
  4. 6. pices of Rock that go around the earth
  5. 9. shooting star