michael's monkey mode

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Across
  1. 6. triple star system
  2. 7. constellation
  3. 9. the ISS tavels around earth every
  4. 11. space telescope
  5. 13. master chief's _______ hammer
  6. 14. can either be a stellar or a planetary of these
  7. 15. things in the sky that give you service
  8. 16. disc in the solar system
  9. 17. vehicle company
  10. 19. the distance a beam of light travels on earth
  11. 20. flammable gas
  12. 21. twinkle twinkle little ____
Down
  1. 1. our solar system in the galaxy
  2. 2. space probe launched by nasa in 1977
  3. 3. empty space with high gravity
  4. 4. group of stars
  5. 5. _____ gum
  6. 8. the resistance to acceleration
  7. 10. home planet
  8. 12. station in space
  9. 13. star wars takes place in what?
  10. 18. friction