Stars an Galaxies crossword

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Across
  1. 3. the sun is on the edge of the ______?
  2. 6. a fairly bright star located within one degree of the north celestial pole
  3. 7. when a star runs out of fuel to burn
  4. 9. the first stage of a small and medium star
  5. 11. compact objects that are created in the core of massive stars
  6. 15. a scatter graph of stars showing the relationship between the stars absolute magnitude
  7. 20. the galaxy that contains middle aged stars
  8. 21. early stage in the evolution of a star
  9. 22. the galaxy that contains young stars
  10. 23. distance that light travels in a year
  11. 24. measurment of brightness
Down
  1. 1. a cluster of stars,gas, and dust that are held together by gravity
  2. 2. the remnants of very massive stars with gravity so strong not even light can escape it
  3. 4. a measure of a stars brightness as seen on Earth
  4. 5. stars live out the majority of their lives in a phase called _____?
  5. 8. brightness of a star as it would be seen at a standard distance of 10 parsecs
  6. 10. the blue white hot core left behind
  7. 12. a unit of length equal to the distance of the earth from the sun
  8. 13. a old star whose diameter is about 100 times bigger than it originally was and had become cooler.
  9. 14. the type of spiral galaxy that the Milky Way is.
  10. 16. the galaxy that contains old stars
  11. 17. a gigantic cloud of gas and dust from which stars are made
  12. 18. The sun is a type of _____?
  13. 19. all matter an energy including the Earth an galaxies