Nuclear Fusion and the Stellar Life Cycle

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Across
  1. 2. explosion of the biggest stars when they run out of fuel
  2. 6. next stage of our sun
  3. 8. stops stars from exploding
  4. 9. Happens in the core of stars; H+H=He
  5. 10. hot star color
  6. 12. isotope; "heavy hydrogen"
  7. 13. must be high for fusion to take place
  8. 14. star system with two stars
  9. 17. "baby" star
  10. 19. outer atmosphere of sun
Down
  1. 1. Star fuel
  2. 3. sun's wavelength of radiation that reaches Earth
  3. 4. must be high for fusion to take place
  4. 5. aside from hydrogen, all other elements in our body came from these
  5. 7. these dwarves are failed stars
  6. 9. nearby shockwave causes contraction to make stars
  7. 11. cool star color
  8. 15. the scientific term for the path of a photon out of a star
  9. 16. packet of gamma ray energy made by fusion
  10. 18. will our sun ever become a black hole