Astronomy Review

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Across
  1. 5. study of the origin and evolution of the universe
  2. 6. scientist who discovered red shifts in far away galaxies
  3. 8. the explosion of a star
  4. 10. what stars use for fusion after there is no more hydrogen
  5. 11. method GPS satellites use to find the location of a receiver
  6. 13. large clouds of dust and gas
  7. 14. end of a star of more than 30 solar masses
  8. 15. closest star to the sun
  9. 16. very dense stars the size of cities
  10. 17. how scientists find out the composition of stars
  11. 19. brightness of a star as seen from Earth
  12. 21. stars like the sun finish their lives as a _______
  13. 22. total amount of energy produced by a star
  14. 24. 2 x 10^30 kg
  15. 25. force that is causing the universe's expansion to accelerate
Down
  1. 1. stars that burn hydrogen are in the _______ on the H-R diagram
  2. 2. hottest colour of stars
  3. 3. most common type of galaxy
  4. 4. how long it takes a satellite to complete one orbit
  5. 7. distance light travels in a vacuum in one year
  6. 9. element that needs more energy to fuse than it creates
  7. 12. orbit satellites that always stay above the same point on Earth are in a _______
  8. 18. loss of altitude by satellites over time
  9. 20. an early star
  10. 23. first satellite in space