Stars

123456789101112131415161718192021
Across
  1. 3. launched in 1977 still going in a straight line
  2. 6. NASA's invention
  3. 7. weight
  4. 8. H on the periodic table
  5. 11. the planet we live on
  6. 13. a giant cloud of dust and gas in space
  7. 14. the north star
  8. 16. doing nothing or to remain unchanged
  9. 17. an area of immense gravity that light cant even escape
  10. 18. the thing that keeps us from floating
  11. 21. 6 trillion miles
Down
  1. 1. the earth spines at 17,500 mph to spin
  2. 2. many stars
  3. 4. beyond the orbit of neptune
  4. 5. spiral galaxy near the milkyway
  5. 8. space telescope
  6. 9. something humans made to put in space
  7. 10. a huge collection of stars dust and gas
  8. 12. triple Star system is southern constellation
  9. 15. circle around
  10. 18. billions of stars
  11. 19. earth, Mars, and Jupiter
  12. 20. bright thing in the sky