Stars and Galaxies

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Across
  1. 5. the process of element formation in stars
  2. 8. our Milky Way is a _______ galaxy because of its arms
  3. 10. spectral class is determined by ___________
  4. 11. this is the closest star to us and it has a luminosity of 1
  5. 13. the hottest stars are __________
  6. 16. how really big stars die
  7. 17. the coldest stars are ___________
  8. 18. these round to oval galaxies are less common than spiral galaxies
Down
  1. 1. these galaxies have unusual shapes that may be the result of interactions with others
  2. 2. our sun will evolve next into a red _____
  3. 3. a very high mass star will become a black _______
  4. 4. the star type with a very high luminosity and a range of temperatures
  5. 6. a star that is massive but not big enough to become a black hole will become a ____________ star
  6. 7. the sun is a type of main ____________ star
  7. 9. these galaxies are like a cross between spiral and elliptical
  8. 12. the most abundant element in the human body
  9. 14. a white ________ has a low luminosity and high temperature
  10. 15. a collection of stars, planets, and vast clouds of gas and dust