Secrets in Planets

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Across
  1. 2. I am dwarf and farthest away from home
  2. 4. I spin the fastest
  3. 7. I tilt to the other side
  4. 8. I have many rings around me
  5. 9. happiest place in the solar system
Down
  1. 1. my gravity is almost same as yours
  2. 3. the evil twin of blue marble
  3. 5. the big brother
  4. 6. I am filled with iron