SPACE

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Across
  1. 4. Largest planet in solar system
  2. 6. Only planet not visible to the naked eye, discovered in 1846
  3. 8. Coldest planet in solar system, originally thought as star or comet
Down
  1. 1. Smallest planet in solar system, shares name with metal
  2. 2. Adorned with ringlets
  3. 3. Known as red planet, exists as chocolate bar on Earth
  4. 5. Second planet from the sun, named after Roman Goddess
  5. 7. we all live on this planet