Space, man

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Across
  1. 3. 'Belt' between Mars + Jupiter
  2. 6. Olympus Mons is found here
  3. 7. Furthest planet
  4. 9. Orbits the sun in 365 days
Down
  1. 1. Planet tipped on its side
  2. 2. Hottest planet in the SS
  3. 4. Saturn's rings are made of:
  4. 5. Largest gas giant
  5. 6. Closest planet to the sun
  6. 8. No longer a planet