H-R Diagram Crossword Puzzle

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Across
  1. 2. upper limit on mass of stars (xMsun)
  2. 11. the "hot" side of the H-R diagram
  3. 12. stars form due to _____ gas and dust clouds
  4. 14. have diameters more than 100x our Sun
  5. 16. a developing star
  6. 17. Russell's first name
  7. 18. swirling winds cause a nebula to take this form
  8. 21. percentage of stars along the main sequence (roughly)
  9. 23. (T/F) main sequence (MS) stars vary in temperature
  10. 24. have diameters between 10x - 100x our Sun
  11. 25. fate of our Sun, stars nearing end of life
Down
  1. 1. xx millions of years for our sun from protostar to MS
  2. 3. Hertzsprung's first name
  3. 4. absolute or apparent
  4. 5. life path depends on this
  5. 6. (T/F) main sequence (MS) stars fuse helium into hydrogen
  6. 7. stars that have been or will be on main sequence
  7. 8. most luminous stars are here
  8. 9. runs from the upper left to lower right
  9. 10. Hertzsprung's country of origin
  10. 13. neighbor star, not on the main sequence
  11. 15. Russell's country of origin
  12. 19. fate of a massive star
  13. 20. M-type stars are here
  14. 22. nuclear fusion begins at this (xx million *F) temperature