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.[lower-alpha 1] 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 Neptune
Location of Neptune
- Milky Way Galaxy – barred spiral galaxy
- Orion Arm – a spiral arm of the Milky Way
- Solar System – the Sun and the objects that orbit it, including 8 planets, the eighth and furthest planet from the Sun being Neptune
- Orion Arm – a spiral arm of the Milky Way
Movement of Neptune
Features of Neptune
Natural satellites of Neptune
Retrograde moons of Neptune
- Triton
- Atmosphere of Triton
- List of geological features on Triton
- Halimede
- Psamathe
- Neso
History of Neptune
Exploration of Neptune
Exploration of Neptune
Flyby missions to explore Neptune
Future of Neptune exploration
Proposed missions to explore Neptune
- Interstellar Express
- Neptune Orbiter
- ODINUS
- Trident
Notes
- Neptune is denser and physically smaller than Uranus because Neptune's greater mass gravitationally compresses the atmosphere more.
References
External links
- NASA's Neptune fact sheet
- Neptune from Bill Arnett's nineplanets.org
- 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)
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