Isabelle

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Across
  1. 4. a cloud of gas and dust
  2. 6. the only star in our solar system
  3. 10. the process that fuels a star
  4. 11. a star that is enlarged and at the end of life
  5. 12. an almost fully dead star
  6. 14. a hole in spacetime after a supernova
Down
  1. 1. a huge sphere of very hot gas
  2. 2. a star before nuclear fusion
  3. 3. everything that has, will, or does exist
  4. 5. a fully dead star
  5. 6. a massive explosion when a star dies
  6. 7. a powerful star that forms after supernova
  7. 8. the element that fuses to make helium
  8. 9. the distance light travels in a year
  9. 13. the abbreviation for leftover heat from big bang