Stars, Galaxies, Universe

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Across
  1. 3. An oval shaped Galaxy
  2. 5. The closest galaxy to Earth
  3. 6. A galaxy that doesn't have a particlar shape
  4. 10. Stars spend 90% of their life
  5. 13. How bright a star actually is
  6. 15. The color of the hottest stars
  7. 16. A star that has a size larger than an average star
  8. 17. The stage in a star's life when the core is really hot and has a lot of mass
  9. 19. The size of our sun
  10. 20. The atoms stars fuse for fuel
Down
  1. 1. The "old age" years of a star's life
  2. 2. How bright a star appears from Earth
  3. 4. When a white dwarf begins to cool down
  4. 7. All stars, planets, galaxies, and space
  5. 8. The name of our galaxy
  6. 9. The place where a star is born
  7. 11. A large ball of gas and dust
  8. 12. A star that is bigger than a giant star
  9. 14. The shape of the milky way
  10. 18. The color of the coolest stars