Topic 12 Pt 2

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Across
  1. 1. a law that states that the farther away a galaxy is, the faster it is moving away from us
  2. 5. all of space and everything in it
  3. 6. Parallax can only be used to determine the distance to __ stars
  4. 8. these stars last 200 billion years
  5. 12. the blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space
  6. 15. what does pulsar stand for?
  7. 16. a large cloud of gas and dust in space
  8. 18. the brightness a star would be if it were at a standard distance from Earth
  9. 19. brilliant explosion of a dying supergiant star
  10. 21. what is the name of our galaxy?
  11. 22. a huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity
  12. 24. a contracting cloud of gas and dust with enough mass to form a star
  13. 25. what determines the brightness of a star?
  14. 26. these stars last 10 billion years
Down
  1. 2. what do astronomers use to determine the elements found in a star?
  2. 3. a spinning neutron star that gives off radio waves
  3. 4. a star is formed when gravity causes the gas and dust of a nebula to become so dense and hot that ___ occurs
  4. 7. what determines the length of a star's life?
  5. 8. what type of galaxy is the Milky Way?
  6. 9. the distance that light travels in one year
  7. 10. the apparent movement of an object against distant backgrounds
  8. 11. a graph used to classify stars according to their surface temperature and brightness
  9. 13. the brightness of a star as seen from Earth
  10. 14. what color are the coolest stars?
  11. 17. what color are the hottest stars?
  12. 20. these stars last 10 million years
  13. 23. the initial explosion that resulted in the formation and expansion of the universe