Outside the Solar System

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Across
  1. 1. a close group of similar objects
  2. 3. someone trained to travel and perform tasks in space
  3. 5. a scientist who studies the origin and structure of the universe
  4. 9. a measure of the amount of radiating or reflected light coming off a star or other celestial object; brightness
  5. 10. a region or cloud of interstellar dust and gas appearing as a bright or dark patch
  6. 11. a large collection of planets, gas, dust, and millions or billions of stars, bound together by gravity
  7. 13. a vehicle used for traveling in space
  8. 14. a scientist who studies planets, stars, galaxies, and other objects in space
Down
  1. 2. any planet that exists outside our Solar System
  2. 4. the whole universe
  3. 5. a group of stars that forms a shape and is named for that shape
  4. 6. the death explosion of a massive star, resulting in a sharp increase in brightness followed by a gradual fading
  5. 7. an instrument used to make distant objects look closer
  6. 8. all things that exist in space
  7. 12. to revolve around another object