SPACE!!

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Across
  1. 2. Fastest orbiting planet
  2. 4. Rotates on an axis.
  3. 6. Biggest Moon.
  4. 8. Farthest away from the sun.
Down
  1. 1. Biggest planet
  2. 2. Red Planet
  3. 3. To go around
  4. 5. Has a huge Ring on it
  5. 7. Hottest planet
  6. 9. Only planet known with animals and humans