stars or some stuff like that

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Across
  1. 2. _______ peroxide
  2. 6. the force one object exerts on another
  3. 8. nasa talks about it a lot
  4. 9. the closest star system to our Solar System
  5. 11. _________ dish for tv
  6. 13. ______ space telescope
  7. 16. a named formation of stars
  8. 18. a distance of how long light needs to ravel
  9. 19. the galaxy we live in
  10. 20. what objects are made of
  11. 22. the north star
Down
  1. 1. a formation of stars thats not a constellation
  2. 3. what the earth does around the sun
  3. 4. third zone of our solar system
  4. 5. what planet we live on
  5. 7. an objects resistance to motion
  6. 10. mythological greek princess
  7. 12. this would be earth, mars, mecury etc.
  8. 14. there are millions of these in the night sky
  9. 15. what the milky way is
  10. 17. hour and a half in minutes
  11. 21. not even light can get away from it