Light Years

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Across
  1. 6. Second closest star to the Earth
  2. 8. the galaxy our solar system is in
Down
  1. 1. Shaped like ovals
  2. 2. made up of everything the orbits the sun
  3. 3. No defined shape or structure
  4. 4. A collection of gas, dust, stars, and solar systems that are held together by a very powerful gravitational force.
  5. 5. Central bulge and arms that spiral the center
  6. 7. the distance light travels in a year