Rylen .R space crossword

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Across
  1. 2. astronomical distance
  2. 3. can either be a stellar or planetary of these
  3. 4. what is the _______ space station
  4. 7. the planet you live on
  5. 9. the milky way is a what?
  6. 10. group of stars to make something recognizable
  7. 12. what light can't even escape
  8. 13. gas needed to make a star
  9. 15. next closest galaxy to ours
  10. 17. iss goes around our planet in what time
  11. 19. what thing other than distance is needed for gravity?
  12. 20. the brightest star in the night sky
  13. 21. what makes planets go around the sun
Down
  1. 1. what does the iss stand for
  2. 5. what galaxy is above us at night
  3. 6. what was launched in 1977?
  4. 8. earth is a what?
  5. 11. brightest star in the southern constellation
  6. 14. what holds you down on a planet
  7. 16. what thing makes gps capable
  8. 18. our sun is a what?