Space Crossword

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Across
  1. 3. all of space
  2. 5. a rotating disc of spiral arms
  3. 6. a galaxy between a elliptical and spiralgalaxy
  4. 7. distance light travels in a year
  5. 8. what you see at night
Down
  1. 1. center of universe
  2. 2. a cloud of dust and gas
  3. 4. most abundant of galaxies