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1.
  Largest planet of our solar system
  Planet with most-tilted axis that seems to spin on its side
  Planet, besides Jupiter, that has storms as revealed by dark spots
  Brightest planet as viewed from the Earth
2.
  Least dense planet of our solar system
  Planet with fastest orbiting speed around the Sun
  Most dense planet of our solar system
3.
  Red Planet
4.
  Smallest planet of our solar system
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