Stellar Evolution

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Across
  1. 2. a cool very bright star, found in the top corner of the HR diagram
  2. 4. a hot, dim star found in the bottom left of the HR diagram
  3. 6. a star that is in the middle of its life cycle
  4. 8. when an object is moving towards an observer
  5. 11. the brightness of a star as seen from earth
  6. 13. the remains of a supernova, when a massive star runs out of fuel and collapses
  7. 14. when an object is moving away from an observer
Down
  1. 1. an instrument used to determine the elements found in a star
  2. 3. superdense point that some supergiants turn into at the end of their life, even light cannot escape these
  3. 5. a cloud of gas and dust where stars form
  4. 7. the actual brightness of a star
  5. 9. how bright a star is
  6. 10. our sun is this
  7. 12. a diagram that shows star temperature and magnitude
  8. 15. a stars fuel source