planets

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Across
  1. 2. named after the roman goddess of love and beauty
  2. 3. explorers who travel into outerspace
  3. 5. Saturn is known for these and they are made up of ice and dust
  4. 7. the largest of these is at the center of Uranus
Down
  1. 1. four planets closest to the sun
  2. 4. all planets orbit around this
  3. 6. also the name for a chemical used in old thermometers
  4. 8. the only planet capable of sustaining life