Space!

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Across
  1. 3. One of the big ones along with Jupiter
  2. 5. Planet's Path
  3. 7. The Red Planet
  4. 9. You are here!
  5. 10. Tool to see the stars
Down
  1. 1. Vehicle to visit the stars
  2. 2. The sun and all the planets
  3. 4. Night light
  4. 6. The darkest part of space
  5. 8. The Milky Way (e.g.)