Big bang theory

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Across
  1. 3. it’s not a polar system it’s a ____ System!
  2. 6. a another word for a explosion sound
  3. 8. half of 2 million
  4. 11. something growing
  5. 12. we live in a ____
  6. 13. the Big Bang theory happened ___
  7. 14. A bomb does this
  8. 15. something that doesn’t take up much space
Down
  1. 1. rhymes with comic
  2. 2. there are eight ___ In our solar system
  3. 4. the opposite of last is ___
  4. 5. another word for compact
  5. 7. large space rocks
  6. 9. a large area
  7. 10. scientific word for a idea