OUTER SPACE

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Across
  1. 5. Second largest planet, gas giant, famous for its rings
  2. 6. Largest planet after Earth
  3. 7. You cannot land on these types of planets due to its atmosphere
  4. 10. Jovian Moon
  5. 12. Largest planet in the solar system
Down
  1. 1. Greek equivalent of 11 down
  2. 2. Year the Kuiper Belt was Discovered
  3. 3. Only planet named after a Greek God
  4. 4. Planet the collided with Earth and created the Moon
  5. 8. Planets 7 and 8 can also be considered these
  6. 9. Smallest planet in our solar system
  7. 11. Dwarf Planet since 2006