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Outline of Neptune

The following outline is provided as an overview of and topical guide to Neptune:

Neptune – eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth and slightly larger than Neptune.[a] Neptune orbits the Sun once every 164.8 years at an average distance of 30.1 astronomical units (4.50×109 km). It is named after the Roman god of the sea and has the astronomical symbol ♆, a stylised version of the god Neptune's trident.

Classification of NeptuneEdit

Location of NeptuneEdit

Movement of NeptuneEdit

Features of NeptuneEdit

Natural satellites of NeptuneEdit

Retrograde moons of NeptuneEdit

Prograde moons of NeptuneEdit

History of NeptuneEdit

History of Neptune

Exploration of NeptuneEdit

Exploration of Neptune

Flyby missions to explore NeptuneEdit

Future of Neptune explorationEdit

Proposed missions to explore NeptuneEdit

See alsoEdit


  1. ^ Neptune is denser and physically smaller than Uranus because Neptune's greater mass gravitationally compresses the atmosphere more.


External linksEdit

  • NASA's Neptune fact sheet
  • Neptune from Bill Arnett's
  • Neptune Astronomy Cast episode No. 63, includes full transcript.
  • Neptune Profile at NASA's Solar System Exploration site
  • Planets – Neptune A children's guide to Neptune.
  • Merrifield, Michael; Bauer, Amanda (2010). "Neptune". Sixty Symbols. Brady Haran for the University of Nottingham.
  • Neptune by amateur (The Planetary Society)