Space Crossword 7999

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Across
  1. 2. 4 planet
  2. 7. 6 planet
  3. 9. Proved heliocentrism
  4. 10. Goddess of strife
  5. 12. Orbits a star
  6. 15. The moon covers the sun
  7. 16. Orbits a planet
  8. 18. 3 planet
  9. 19. Our system
  10. 20. Hydrogen Fusion
  11. 21. Huge gravity
  12. 23. Zero mass, infinite density
  13. 24. Force that keeps us down
  14. 27. Moons larger than planets
  15. 29. Heliocentric scientist
  16. 30. Red giant in Orion
  17. 31. Dog star
  18. 33. Orbit a star, small
  19. 35. Large nearby galaxy
  20. 36. Dwarf planet (hades)
  21. 37. Most common element in the universe, fused in young stars
Down
  1. 1. Hunter constellation
  2. 3. Dead star full of neutal subatomic particles
  3. 4. 5 planet
  4. 5. Our galaxy
  5. 6. 2 planet
  6. 8. 7 planet
  7. 11. Gallilean moons
  8. 13. 1 planet
  9. 14. Dwarf planet in asterioid belt
  10. 17. Star birth
  11. 22. The earth covers the moon
  12. 25. Discovered gravity
  13. 26. Our star
  14. 28. Crashes into earth
  15. 32. Cannot be fused
  16. 34. 8 planet