Reeds space crossword

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Across
  1. 2. 6 trillion miles
  2. 3. can either be stellar or planetary of these
  3. 4. well-known space telescope
  4. 7. the planet we live on
  5. 9. milky way
  6. 10. the big dipper is one of these
  7. 12. know one knows what is inside of it
  8. 13. natural gas
  9. 15. next closest galaxy to ours
  10. 17. the ISS orbits earth in what time
  11. 19. matter in partial or object
  12. 20. another name for the North star
  13. 21. earth _____s the sun
Down
  1. 1. aberration is ISS
  2. 5. our galaxy
  3. 6. space probe launched by NASA
  4. 8. Mars
  5. 11. triple star system in Southern consultation
  6. 14. moon has very little of this
  7. 16. international space station
  8. 18. Our sun is a _____