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- Discovered on September 23, 1846
- Discovered by three scientists: Urbain Le Verrier, John Couch Adams and Johann Galle
- Named after the Roman god of the ocean.
- Radius: 24,764 kilometers (3.8 times Earth's radius)
- Circumference: 155,597 kilometers
- Surface area: 7.64 million square kilometers (14.9 times Earth's)
- Mass: 1.02x1026 kilograms (17.1 times Earth's)
- Average distance from the Sun: 4.49 billion kilometers
- 13 known moons in its orbitNASA-JPL: Neptune - Facts & Figures
- : 80.0%
- : 19.0%
- : 1.5%
- Trace amounts of Hydrogen Deuteride, EthaneNASA: Neptune Fact Sheet
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Neptune is the fourth largest planet in the Solar System, and is the most distant official planet that orbits the Sun. It is considered one of the "gas giants" because it is composed mainly of gases, and lacks a solid, rocky crust like Earth.
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Astronomical Surprise
Neptune's existence was mathematically-predicted by Galileo between 1612 and 1613—more than two hundred years before it was visually confirmed. However, Galileo believed that the object accounted for in his calculations was a fixed star. Astronomers didn't discover that Neptune was in fact a planet until 1846.NASA-JPL: Neptune - Overview
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Neptune Questions
How were Uranus, Neptune, and Pluto discovered by scientist? 1 AnswerIn short: Uranus was discovered by sight, Neptune and Pluto by deductive reasoning. Let´s see it how all was done: http://www.universetoday.com/wp-content/uplo... read more
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@UTsavage I dont wnt an obit, or a eulogy, or a trad service. ive Neptune Society, wnt ashes scattered in Yosemite & CO Rocky Mtns: home
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Glanmire & Neptune won last night:) good fun!:)
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Neptune Coffee is my new favorite. Thanks Meghan and Hannah.
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RT @CantPleadThe1st: Emmy just called Neptune Clark. Twice... Haha too funny
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I've seriously made a playlist for the following CDs -> Earth, Mercury, Pluto, Saturn, Jupiter, Neptune, and Mars. And thats 12-16songs each
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