Stellar Evolution

12345678910111213141516171819202122232425
Across
  1. 3. The small hot core left after a low-mass star dies
  2. 8. A graph showing the relationship between star brightness and temperature
  3. 11. The process of matter gathering due to gravity
  4. 12. A cloud of gas and dust where stars are born
  5. 15. A unit used to measure large distances in space
  6. 17. The brightness of a star based on energy output
  7. 18. The main fuel used by stars to produce energy
  8. 19. An incredibly dense star formed after a supernova
  9. 20. A large, cooler star formed when hydrogen runs low
  10. 23. The longest and most stable stage in a star’s life
  11. 25. A glowing shell of gas ejected by a dying star
Down
  1. 1. The central region of a star where fusion occurs
  2. 2. A failed star that cannot sustain fusion
  3. 4. The process that powers a star by joining hydrogen atoms
  4. 5. A massive explosion marking the death of a large star
  5. 6. An extremely large and bright star near the end of its life
  6. 7. The force that pulls gas and dust together to form stars
  7. 9. The element formed when hydrogen fuses in a star
  8. 10. A forming star created when gravity pulls material together
  9. 13. A region in space where gravity is so strong that light cannot escape
  10. 14. A measure that affects a star’s color
  11. 16. The amount of matter in a star that determines its life cycle
  12. 21. A system used to classify stars by temperature and color
  13. 22. A small, cool star with a very long lifespan
  14. 24. A stream of charged particles released from a star