Galaxies

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Across
  1. 2. researching something fully
  2. 3. a group of single stars
  3. 4. all of space and everything in it
  4. 6. an explosion that formed the universe
  5. 7. the distance that light travels in 1 year
  6. 9. brightness seen from earth
  7. 11. cloud of gas and dust
Down
  1. 1. a more accurate scale of the entire solar system
  2. 2. how bright it actually is
  3. 5. a cloud of dust containing an immense volume
  4. 8. the core that is left behind
  5. 10. an explosion