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Across
  1. 3. highly luminous star
  2. 5. dense compact remnant core after supernova
  3. 6. cloud of dust
  4. 9. most stable phase of starlife
  5. 10. hypothetical non luminous star
Down
  1. 1. extremely massive luminous star
  2. 2. certain range where living things can thrive
  3. 4. star exploding
  4. 7. very young star
  5. 8. dense compact remnant core left behind after star exhaused