solar system

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Across
  1. 3. only planet not visible to the naked eye
  2. 4. nicknamed the "red planet"
  3. 7. coldest planet in our solar system
  4. 8. has 53 moons
Down
  1. 1. closest to sun
  2. 2. hottest planet
  3. 5. has a ring around it
  4. 6. perfect for life