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Neptune

  • Is Neptune sometimes farther out than Pluto?
  • What is the weather like on Neptune?
  • What is the Great Dark Spot?
  • Does Neptune have rings?
  • How old is Neptune?
  • When was Neptune discovered?
  • How long is a day on Neptune?
  • How far away is Neptune from the Sun?
  • How long does it take to get to Neptune from Earth?
  • How strong is the gravity on Neptune?
  • How big is Neptune?
  • How many moons does Neptune have?
  • How did Neptune get its name?
  • Why is Neptune blue?

Why is Neptune blue?

Neptune's atmosphere is made up of hydrogen, helium and methane. The methane in Neptune's upper atmosphere absorbs the red light from the sun but reflects the blue light from the Sun back into space. This is why Neptune appears blue.


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