Space

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Across
  1. 3. a robot probe
  2. 6. research lab in space
  3. 7. Bigness of something
  4. 8. a type of gas
  5. 11. live on it
  6. 13. big cloud of gas and dust
  7. 14. star in constellation
  8. 16. remains unchanged
  9. 17. a strong hole that nothing can escape
  10. 18. holds or pulls us
  11. 21. a distance that light travels
Down
  1. 1. 1 hour and 30 minutes
  2. 2. recognizable pattern
  3. 4. a region in outer solar system
  4. 5. Greek myth
  5. 8. pile
  6. 9. object that moves around larger obhect
  7. 10. a Galaxy in solar system
  8. 12. triple star system
  9. 15. a path around something
  10. 18. group of stars
  11. 19. Jupiter
  12. 20. a bright light you can see on the sky