12.3 What Are Stars and Galaxies?

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Across
  1. 5. rapid formation of many new stars caused by cosmic crashes
  2. 6. the shape of a galaxy that looks like a pinwheel
  3. 7. shape of a galaxy that don't have a particular shape
  4. 9. everything that exists
  5. 11. stars have a wide range of this; some can be the size of a planet while others are much larger
  6. 12. scientists who study space and everything in it
  7. 14. looking at a star's _________ can tell us about its temperature
  8. 16. the name of our galaxy
Down
  1. 1. Edwin __________ was the first to study galaxies.
  2. 2. stars form when this causes gas and dust particles to pull together; also holds together galaxies
  3. 3. type of spiral galaxy that has a long barred center
  4. 4. This size of star can be more than 100 times the size of our sun.
  5. 6. huge ball of hot, glowing gas that produces their own heat and light
  6. 8. group of billions of stars, objects that orbit the stars, gas, and dust
  7. 10. shape of a galaxy that can be shaped like a perfect sphere or look like a flattened globe
  8. 12. study of objects in space and their characteristics
  9. 13. galaxies are always doing this
  10. 15. What color of star is the hottest?