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Neptune is the eighth and farthest solar planet. Named for the Roman god of the sea, Neptuenn is the fourth-largest planet by diameter and the third-largest by mass, and the most dense of the solar gas giants. 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 but not as dense. On average, Neptune orbits the Sun at a distance of 30.1 AU, at approximately 30 times the Earth–Sun distance.

in Science FictionEdit

  • Olaf Stapledon's 1930 novel Last and First Men offers Neptune as the final home of the highly evolved human race. The planet is depicted as having a dense atmosphere but with a solid surface.

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Alternative names for NeptuneEdit

  • Pumpsylvania - David Ohle's novel The Age of Sinatra, p. 139
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