Stars & Galaxies

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