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N E P T U N E |
Characteristics
Neptune is the ninth planet of the Solar System. Form leaves from denominated outer or gaseous planets. Its name I came from the Roman God Neptune.After the Uranus discovery , it was observed that the orbits of Uranus, Saturn and Jupiter did not behave as they predicted the laws of Kepler and Newton. The Adams and It Verrier, of independent form, calculated the position of another planet, Neptune, that found Galle, the 23 of September of 1846, to less of a degree of the position calculated by Adams and Him Verrier. Later, one noticed that Galileo already had observed Neptune in 1611, but it had taken it by a star.
When orbiting so far from the sun, Neptune receives very little heat. Its temperature in the surface is of -218º Celsius (below cero). Nevertheless, the planet seems to have an internal heat source. One thinks that it can be a surplus of the heat generated by the matter concretion during the creation of the planet, that now radiates heat slowly towards the space. The wind speed in the atmosphere of Neptune, of up to 2,000 km/h, is the greater one of the Solar System and it thinks that they are fed on the internal heat flow.
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Neptune 8º and last planet of the Solar System |
The internal structure is looked like the one of Uranus: a rocky nucleus covered by a frozen scab, hidden under a heavy atmosphere and thickens. Both third interiors of Neptune are made up of a mixture of fused rock, water, ammoniac liquid and methane. The outer third is hot a gas mixture composed of hydrogen, helium, water and methane. Like Uranus and unlike Jupiter and of Saturn, the composition of the internal structure of Neptune thinks that it is formed by different layers. Like Uranus, the magnetic field of Neptune is strongly inclined in relation to its spin axis, to 47° and displaced at least 0.55 radios (about 13,500 kilometers) of the physical center of the planet. Comparing the magnetic fields of both planets, the scientists have reached the conclusion that that extreme direction could be characteristic of the flows in the interior of the planet and not the result of the inclination of the Uranus axis
| Orbital characteristics | |
|---|---|
| Average Dist. of the Sun | 9.539 UA |
| Average radio | 1.427.000.000 km |
| Eccentricity | 0,055 |
| Orbital period (sidereal) | 29.46 years |
| Period of rotation | 10h.39m. |
| Orbital speed average | 9,64 km/s |
| Inclination of the axis | 29,00° |
| Number of satellites | 6 |
| Physical characteristics | |
|---|---|
| Equatorial diameter | 120,000 km |
| Mass | 95,15Tierra |
| Average density | 0,69 g/cm³ |
| Superficial gravity | 0.92 Earth |
| Speed of escape | 35,6 km/s |
| Average Temp. superf.: Day | --- |
| Average Temp. superf.: Night | --- |
| Atmosphere | H2I have |
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In the page Web you can obtain more data of each one of our planets and the dwarf planets defined by the IAU of our Solar System.
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Masm Last update 2006-10-20)