space

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Across
  1. 2. Star at the center of solar system
  2. 5. Used to look at far away objects
  3. 6. Largest planet in our solar system
  4. 7. a collection of solar systems
  5. 8. Someone who goes into space
Down
  1. 1. Has 8 phases
  2. 2. Gas giant with rings
  3. 3. one of two gases found in gas giants
  4. 4. Used for travel in space