Astronomy Crossword

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Across
  1. 4. A pattern of stars used to organize the sky
  2. 6. happens twice a year
  3. 7. vast collection of stars, gas, and dust
  4. 10. something that happens rarely or never
  5. 11. Galaxy outside of our solar system
Down
  1. 1. A vast collection of stars, gas, and dust typically 10,000-100,000 light years away
  2. 2. two stars that lie very close
  3. 3. dirty snowball
  4. 5. an event that occurs when a shadow is in second body
  5. 8. The average distance from earth to the sun
  6. 9. edge of a celestial object’s visible disk
  7. 10. mass that is so dense nothing can escape