Stars & Galaxies

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Across
  1. 3. change in frequency when source/observer is moving
  2. 4. group of stars organized into a recognizable pattern
  3. 6. study of evolution of universe
  4. 10. where most stars are found on H-R diagram
  5. 13. star that collapsed under gravity, forms neutrons.
  6. 15. apparent shift in position of object when viewed from different locations
  7. 16. rapidly spinning neutron star emits radio & optical energy
  8. 17. (magnitude) brightness of a star 32.6 LY from earth
  9. 19. (magnitude) brightness of a star as seen from earth
Down
  1. 1. very large and bright star has a hot core, used up most of its hydrogen
  2. 2. object so massive that light can't even escape its gravity
  3. 5. distance light travels in a year
  4. 7. small hot dim star, leftover center of an old sunlike star
  5. 8. theory that supports the formation of the universe
  6. 9. very luminous object that produces energy at a high rate
  7. 11. star that suddenly becomes brighter
  8. 12. collection of stars, dust, a& gas bound by gravity
  9. 14. cloud of dust & gas, where stars are born.
  10. 18. body composed of gas that emits light