Galaxies

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Across
  1. 5. -elliptical galaxy
  2. 9. -French astronomer who identified some of the first galaxies to be seen.
  3. 12. -how many stars are in the universe?
  4. 17. flat rotating disk that contains stars, gas, and dust, and a central concentration of stars.
  5. 19. how old is the milky way?
  6. 20. - telescope that has helped astronomers discover more information on galaxies, and help scientists know how galaxies and planets are formed.
Down
  1. 1. American astronomer who proved that objects in the sky were to be clouds of dust and gas.
  2. 2. what happens when a galaxy dies?
  3. 3. what percentage of the galaxy is seen with the naked eye?
  4. 4. Most galaxies have this at the center of them.
  5. 6. -A galaxy that does not have distinct regular shape.
  6. 7. a spiral galaxy with a central bar shaped structure that contains stars.
  7. 8. - what is the main thing galaxies are named after?
  8. 10. the closest galaxy to the milky way
  9. 11. irregular galaxy
  10. 13. -spiral galaxy
  11. 14. -barred spiral galaxy
  12. 15. galaxy–galaxies whose gravitational fields result in a disturbance of one another.
  13. 16. -One hundred thousand million stars are in the?
  14. 18. -a galaxy with a smooth shape, looking featureless.