life cycle of stars crossword puzzle

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Across
  1. 3. one of the giant stars
  2. 7. after the shockwave works up to the surface a what occurs
  3. 8. low mass red dwarf star
  4. 11. bright object in the sky
  5. 13. runs out of fuel
  6. 15. H fusing to form helium
  7. 16. star with all the empty space squeezed out, star made with only neutrons
  8. 17. extremely high temps. Create a layering affect as other atoms fuse
  9. 18. after Giant stage
  10. 19. a dense cluster of interstellar medium within a nebula
Down
  1. 1. really big star
  2. 2. outwad most layer in a supergiant
  3. 4. one of the super giants
  4. 5. main sequence majority of life
  5. 6. how a star is made and dies is called what
  6. 7. a white dwarf star
  7. 9. after a star collapses it creates a
  8. 10. when a star collapses and contains more than 3 solar masses, no known force can stop it.
  9. 12. collection of interstellar medium
  10. 14. boundry of a black whole where observations cannot be made