Facts for Kids- Neptune

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The 8th planet from the sun.

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Neptune Facts:
  • Neptune is the 8th planet from the sun in our solar system.   It is approximately 2,794 million miles from the sun.
  • Neptune is about 30,775 miles in diameter.
  • It takes Neptune about 165 Earth years to orbit the sun one time.
  • A day (from sunrise to sunset) on Neptune is only about 16 hours.
  • Neptune's atmosphere is made up of hydrogen, helium, and methane.  The methane makes it look blue in color.
  • Neptune has 6 thin rings around the planet.  Some of the rings do not look complete because they are thicker and thinner in some places.
  • The average temperature in Neptune's atmosphere is -370 F.
  • Neptune has at least 8 known satellites, or moons, and there may be more.
  • In 1994, the Hubble Telescope discovered dark spots on the surface that were caused by storms and changes in temperature.   The Voyager 2 spacecraft discovered wind speeds of 1,500 mph (2,400 k/ph) on the planet's surface.
  • Neptune is named after the Roman God of the oceans.

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