The Neptune is considered the most remote planet of the Solar system if not to consider Pluto excluded in 2006 from the list of planets. The Neptune enters into group of giant planets, his orbit is located in 4491.1 million km from the Sun.
Instruction
1. From such long distance the Sun seems not a disk, as on Earth, and a star. The Neptune call the planet shipped in eternal twilight. The illumination created by the Sun in it is 900 times less, than on Earth, but in 525 times more the illumination which is characteristic of our planet under the full Moon.
2. Diameter of the Neptune by 3.9 times surpasses diameter of Earth, and the weight 17.2 times bigger. The Neptune moves around the Sun on almost circular orbit, making one revolution in 164.8 years. Density of the planet is only 1.5 times more than water density. 13 companions of the Neptune are known, it also has a system of rings, all them it is known five: three weak and two bright, they consist of small dust particles.
3. The Neptune was open by calculations. Many centuries Uranium was considered as the most far-out planet as the Solar system. In the middle of the 19th century the exact observations showed that Uranium will take the leave from a way on which it has to follow if to consider indignations of the known planets. It was established that behind Uranium there has to be an unknown body which influences its deviation. Then the mass of this body was calculated and the place in the sky where it has to be is specified. The Neptune found in the specified place in 1846 by means of the telescope.
4. As well as other giant planets, the Neptune very quickly rotates, making one revolution in 16.11 hours. At the same time the equatorial zone of the planet rotates quicker, and polar — more slowly. The Neptune it is impossible to see with the naked eye. On this planet the strongest winds in the Solar system blow, their speed reaches 300 m / c.
5. Molecules of the methane which is composition of the atmosphere of the planet well absorb red beams, deep blue color in which the Neptune's disk is painted is explained by it. The atmosphere of the planet consists of helium (31%), methane (2%) and hydrogen (about 67%), also it contains insignificant impurity of substances which appear as a result of methane photolysis.
6. Average temperature of the Neptune is -214 °C though at such distance from the Sun it had to be even lower. It is considered that the planet has an internal source of heat which nature is not studied yet. Thanks to this source, the Neptune radiates 2.7 times more energy in space, than receives from the Sun.
7. The equator plane at the Neptune is inclined on 29.8 ° in relation to the plane of his orbit, at Earth this corner makes 23.45 °. On the Neptune there is a change of seasons too, however every season more than 40 years last here.