Astronomy Crossword Puzzle

12345678910111213141516171819202122232425
Across
  1. 4. leading theory about the origin of the universe
  2. 6. size of the Sun
  3. 7. heliocentric
  4. 10. a moon of Jupiter
  5. 11. "ringed planet"
  6. 15. highest mountain in the Solar System
  7. 18. moon of Mars
  8. 19. first person to focus the telescope to the heavens
  9. 21. someone who studies astronomy
  10. 22. a constellation meaning "Great Bear"
  11. 25. rocky body too small to be called planet
Down
  1. 1. movement of a planet on its axis
  2. 2. first man on space
  3. 3. brightest star in the Earth's sky
  4. 5. group of stars which forms imaginary patterns
  5. 8. a type of galaxy
  6. 9. named after the Roman god of love and beauty
  7. 12. natural satellite of the moon
  8. 13. famous comet appearing every 76 years
  9. 14. all the matter and energy and contents of space
  10. 16. meteoroid which falls to the ground
  11. 17. first artificial satellite ever launched
  12. 20. universe
  13. 23. nearest galaxy to the Milky Way
  14. 24. collection of gas,dust and billions of stars