Planets

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Across
  1. 3. fifth planet from the sun
  2. 4. only known planet with life
  3. 6. interesting name(pee)
  4. 8. Is blue
Down
  1. 1. smallest planet in the solar system
  2. 2. one day lasts 11 hours
  3. 5. named after Roman god of war
  4. 7. called earths twin or sister