Discovery of Neptune
Neptune was discovered by calculation and observation. Once Uranus had been discovered, the search was on for other planets that could lie outside the orbit of Uranus. Neptune, named after the Roman God of Water was finally discovered 23rd September, 1846. Johann Galle is most closely associated with discovering the planet, but without the assistance of John Couch Adams and Urbain Le Verrier, it would not have been possible. Neptune is the smallest and most remote of the gas giants.
Since Pluto was downgraded to Dwarf planet. Neptune is now the furthest planet from the Sun. Neptune has a deep blue appearance and therefore it was only apt to name the planet after the Roman God.
When Voyager 2 past the planet in 1989, Neptune was discovered to have a faint ring system like the other gas giants. All the pictures we have are of the Voyager encounter with the planet. There are plans for another fly by of the planet but nothing soon.
In the film Event Horizon, the planet is the background setting for the return of a space ship that had disappeared years in the past. All the film happens onboard the craft, there is no voyaging into Neptune or one of its moon. The core of the planet maybe rock but then again it might not be, we don't know for certain. You wouldn't be able to enter the planets atmosphere as it would be too hostile.
- Neptune is the 8th planet from the Sun.
- There are so far 14 known moons in orbit round Neptune.
- Neptune was discovered in 1781 by Johann Elert Bode.
- The planet is classed as a gas planet.
- Neptune derives its name from the Roman god for God of the Sea.
- Neptune was discovered by Johann Elert Bode in 1781.
- The mass of the planet is 102.413 1024kg.
- The equatorial radius of the planet is 24764km whereas the volumetic mean radius is 24,622.00km.
- The equatorial circumference of the Neptune is 154,704.6km.
- The Mean Density of the planet is 1638 kg/m3.
- The surface acceleration of the planet is 11 m/s2.
- The time the planet takes to orbit round the Sun is 60189 days or roughly 164.9 Earth Years.
- The length of a day on the planet is 16.11 hours, i.e. the time it takes to revolve once on its axis.
- The average temperature of the planet is -72K/-201C.
- The surface pressure of the planet is >1000bars .
- Neptune distance from the Sun is about 4,495,100,000.0km.
- The Orbit Eccentricity is 0.0113 degrees, that is how much the orbit deviates from a circle, between 0 and 1.
- The Orbit Inclination is 1.769 degrees, that is how much the orbit deviates from the plane, between 0 and 1.
- The volume of Neptune at the equator is 6254.
- The escape velocity, the speed which is need to break free is 23.5.
- The surface gravity of Neptune is 11.15 compared to Earth which for purpose of this site is 1.
- The following gasses can be found in the Neptune's atmosphere :
- Molecular hydrogen (H2) - 80.0% (3.2%).
- Helium (He) - 19.0% (3.2%).
- Methane (CH4) 1.5% (0.5%).
- More information and the source for the moon can be found at N.A.S.A.
- The page was last updated on 5/26/2018 9:35:19 am.
List of Moons in orbit around Neptune
|Galatea||1989 ||389,262.18 km |
|Halimede||14 August 2002 ||102,518,463.80 km |
|Laomedeia||13 August 2002 ||142,059,611.72 km |
|Larissa||1982 ||462,115.49 km |
|Naiad||1989 ||303,019.17 km |
|Nereid||1949 ||29,067,053.44 km |
|Neso||2002 ||282,584,902.19 km |
|Proteus||1989 ||739,191.57 km |
|Psamathe||29 August 2003 ||290,917,287.50 km |
|S/2004 N1||1 July 2013 ||661,512.60 km |
|Sao||14 August 2002 ||139,009,795.11 km |
|Thalassa||1989 ||314,624.22 km |
|Triton||1846 ||2,229,016.54 km |
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