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