25.2 Stellar Evolution

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Across
  1. 3. The sun cannot produce elements heavier than this element
  2. 5. A developing star not yet hot enough to engage in nuclear fusion
  3. 8. The second stage of a star's evolution
  4. 9. The only energy source of low-mass stars
  5. 10. Found in the constellation Taurus, by the Chinese; remains of a supernova that took place in 1054
  6. 12. The process that produces chemical elements inside stars
  7. 13. The remains of a dead or collapsed star
Down
  1. 1. The galaxy in which we live
  2. 2. The death of a star; explosion
  3. 4. The force that causes stars to eventually run out of fuel and collapse
  4. 6. Beautiful, gleaming spherical clouds; white dwarfs heat these clouds
  5. 7. The dark, cool birthplaces of stars; interstellar clouds
  6. 11. Stage that occurs because the zone of hydrogen fusion continually moves outward, leaving behind a helium core