SPACE BOI

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Across
  1. 1. large cloud of gas in space
  2. 7. distance that light travels in a year
  3. 8. frequencies of electromagnetic radiation
  4. 10. a collection of stars
  5. 11. hot dim star
  6. 12. BOOM!
Down
  1. 2. how bright a star would be up close
  2. 3. space and all the matter in it
  3. 4. brightness of a star
  4. 5. star that has collapsed
  5. 6. relationship between a stars temperature and absolute magnitude
  6. 9. actual brightness of a star