Astronomy

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Across
  1. 4. supreme god of Romans; counterpart of Greek Zeus
  2. 5. small extraterrestrial body that hits the earth's atmosphere
  3. 6. the god of the underworld in ancient mythology
  4. 9. a small frozen mass that travels around the sun
  5. 10. a burst of light used to communicate or illuminate
  6. 11. the distance that light travels in a vacuum in 1 year
  7. 12. a collection of star systems
  8. 14. an immense cloud of gas and dust in interstellar space
  9. 15. a region of space resulting from the collapse of a star
Down
  1. 1. a mass that enters earth's atmosphere, becoming incandescent
  2. 2. pertaining to or characteristic of the universe
  3. 3. any location outside the Earth's atmosphere
  4. 7. of or relating to or caused by gravitation
  5. 8. a configuration of stars as seen from the earth
  6. 13. a small celestial body composed of rock and metal