Dr. Nagy's ASTRONOMY Crossword Puzzle

1234567891011121314151617181920212223242526272829303132333435363738
Across
  1. 1. Even light cannot escape it (two words)
  2. 3. Could have been a star
  3. 6. Zero latitude
  4. 7. mass over volume
  5. 8. before nuclear fusion
  6. 17. Largest entity in universe
  7. 21. Runaway greenhouse planet
  8. 24. Location of heavy elements formation
  9. 25. Milky Way, for example
  10. 26. Bright, cool, large star type (two words)
  11. 28. Oldest life
  12. 30. Disappearance of species
  13. 31. Renewable energy source
  14. 33. 0.00001 km
  15. 34. stellar nurseries
  16. 36. one thousand million
  17. 37. Ringed planet
  18. 38. educated guess
Down
  1. 2. star classification (two words)
  2. 4. System response
  3. 5. Mass unit
  4. 9. rainbow of colors
  5. 10. solar acne?
  6. 11. hottest stars
  7. 12. Start of time?
  8. 13. sought by Brahe
  9. 14. Dinosaur era
  10. 15. Product of respiration (two words)
  11. 16. Navigator's star
  12. 18. orbit
  13. 19. Dirty snowball
  14. 20. _______ unit (Earth to Sun)
  15. 22. fastest spinner
  16. 23. Sun-centered
  17. 27. First telescope user
  18. 29. Earth's center
  19. 32. Closed universe's fate (two words)
  20. 35. Evidence of oxygen in ancient oceans