Earth Science Book 904 - Words to Know

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Across
  1. 3. determines the distance of planets and stars; shows that stars are much farther from us than planets
  2. 7. pinwheel-shaped, fast moving galaxies
  3. 11. stars several hundred thousand light years away
  4. 12. groups of hundreds of thousands of stars bound together
  5. 19. enormous spiral galaxy; second closest to Milky Way Galaxy
  6. 21. group made up of interstellar gas, cosmic dust, and bright young stars in Milky Way Galaxy
  7. 24. measured the Milky Way Galaxy
  8. 25. non-luminous clouds of dust and gas
  9. 27. change in the observed frequency of a wave
  10. 29. band of dark matter that lies along the Milky Way dividing it into two forks
  11. 32. older, dimmer stars in Milky Way Galaxy; formed by the condensation of a cloud of gas and dust
  12. 35. third smaller axis in elliptical galaxies
  13. 36. having figures of revolution with two equal principle axes
  14. 37. galaxy to which our solar system belongs
  15. 38. larger groups of galaxies
  16. 39. uneven groups of young stars
Down
  1. 1. large, flattened sphere surrounding galaxy's center
  2. 2. two very close irregular galaxies orbiting our galaxy
  3. 4. relates the circular velocity of the gas to its distance from the center of the galaxy
  4. 5. part of galaxy where most stars are located for spirals
  5. 6. very distant celestial bodies farther away than other stars that emit much radiation
  6. 8. clouds of dust and gas
  7. 9. system of stars and interstellar matter that makes up the cosmos
  8. 10. nearest large cluster of galaxies
  9. 13. an open cluster in the Milky Way Galaxy
  10. 14. faint band of stars after which our galaxy is named
  11. 15. distance light travels in a year
  12. 16. dark region in the Milky Way Galaxy
  13. 17. formed by very old stars located away from the disk in the Milky Way Galaxy
  14. 18. founder of extragalactic astronomy
  15. 20. ratio of the speed of the galaxies to their distance
  16. 22. any one of a class of galaxies known to have active nuclei
  17. 23. galaxies that are neither elliptical or spiral
  18. 26. empty spaces between galaxies
  19. 28. clump of matter that starts to collapse under its own gravity
  20. 30. egg-shaped, slow-moving galaxies
  21. 31. non-luminous matter making up 90 percent of universe
  22. 33. vast outer region of the Milky Way Galaxy
  23. 34. group of about two dozen nearby galaxies