Chapter 27

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Across
  1. 3. A pattern of stars in the sky.
  2. 4. cloud of dust and gas where stars begin
  3. 6. large stars that blow apart with a tremendous explosion
  4. 7. large groups of stars
  5. 9. stars pair of stars that revolve around each other
  6. 11. spiral galaxy type of spiral galaxy with a bar of stars that runs through the center
  7. 12. diagram a graph of the absolute magnitude of a star plotted against their surface temperature or color
  8. 13. galaxies type of galaxy with a very bright center that contains little dust and gas and is spherical or disk like
  9. 14. magnitude the brightness of a star as seen from Earth
  10. 16. the second stage in the development of a star; the shrinking spinning center region of a nebula
  11. 17. neutron stars that have two beams of radiation that sweep across space
  12. 18. galaxy type of galaxy with a center of bright stars and arms that swirl around the center
  13. 19. clusters groups of hundreds of stars in a sphere shape
  14. 20. clusters group of hundred of stars with a loose shape
  15. 23. giant a cool star that is very bright because of its large surface area that gives off a large amount of light
  16. 24. shift spectrum is shifted toward red and wavelengths appear longer
  17. 26. galaxies type of galaxy with no identifiable shape and an uneven distribution of stars
  18. 27. stars a major grouping of stars on the H-R diagram that forms a narrow band from the upper left to the lower right
Down
  1. 1. nebula expanding shell of gases shed by a dying star
  2. 2. dwarfs stars in the lower left corner of the HR diagram; hot but dim because of their small size
  3. 4. white dwarf star that explodes as it cools, temporarily becoming thousands of times brighter
  4. 5. the distance light travels in one year
  5. 8. stars starts circling the north star
  6. 10. a group of cool, bright stars in the upper right corner of the HR diagram
  7. 11. hole hole in space with a gravity so great that not even light can escape; formed by the collapse of a large supernova
  8. 14. magnitude how bright the star would appear if it were seen from a distance of 32.6 light years
  9. 15. body of gases that gives off tremendous amount of radiant energy in the form of light and heat
  10. 21. An apparent shift in the position or direction of an object when viewed from different locations
  11. 22. star small but dense ball of neutrons caused when the core of a supernova contracts after an explosion
  12. 25. starlike object that gives off radio waves and xrays