Astronomy Chapter 15-16

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Across
  1. 3. All galaxies, space dust, etc. grouped together
  2. 4. High point of super strong gravity, letting no light escape
  3. 7. A grouping of solar systems, space dust, etc.
  4. 11. Curved sections connected to the center of a spiral galaxy
  5. 14. A NASA telescope revolving around Earth
  6. 15. An invisible hypothetical type of matter
Down
  1. 1. Our galaxy
  2. 2. The amount of light in one area
  3. 5. A type of galaxy in an oval shape
  4. 6. A type of galaxy containing spiral arms
  5. 8. A large scale measurement of distance used for space, having to do with light speed
  6. 9. The amount of matter in an object
  7. 10. A type of galaxy with no particular shape
  8. 12. Cloud and dust and gas in space
  9. 13. An object of high luminosity exiting a black hole