Astronomy Crossword

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Across
  1. 2. bang theory a large explosion that started the universe
  2. 3. a galaxy of large group of stars, dust, gases, and other celestial bodies
  3. 5. a rocky metallic object which orbits the sun
  4. 7. a red giant luminous
  5. 10. a gravitational region of strong nothing
  6. 12. a comet that passes the earth every 75-76 years
  7. 13. a small icy celestial that orbits around the sun
  8. 14. a short-lived burning star
  9. 17. fully illuminated moon
  10. 18. where the moon covers the sun
  11. 21. a person who studies stars and space
  12. 22. a dwarf planet that usually orbits Neptune
  13. 24. a star that suddenly increases in brightness
Down
  1. 1. a law stating red shifts of the spectra of distant galaxies
  2. 4. a cluster of stars
  3. 6. my teacher calls himself
  4. 8. a famous astronomer
  5. 9. study of stars and space
  6. 11. a person who goes to space to study about planets and stars
  7. 13. thin curved shaped moon
  8. 15. where the sun and moon are aligned
  9. 16. astrology of twelve different signs
  10. 19. a federal agency responsible for aerospace research
  11. 20. a small low luminosity
  12. 23. a student in physics 10
  13. 25. a transient astronomical event