addition to the Earth, the solar system has another blue planet - Neptune.In 1846 it was opened because of mathematical calculations rather than observations.
What is the most distant planet in the solar system from the sun?
In 1930, Pluto was discovered.Until 2006, he was considered the ninth planet in the last solar system.While Neptune - only the eighth.However, in 2006 the International Astronomical Union has been given new meaning to the term "planet", under which Pluto would not fall.There is even a version that does not belong to the solar system, and is part of the Kuiper Belt.
Also, he was deprived of the title from 1979 to 1999, at this time, Pluto was inside the orbit of the planet Neptune.
Therefore, answering the question: "What are the most distant planet of the Solar System" - can be heard in response, both names.
Neptune in Roman mythology is the god of the sea.
Opening
Officially the farthest planet in the Solar System - Neptune - was discovered in 1846.However, even in 1612, it has been described by Galileo.But then he considered it a fixed star, why was not recognized by its discoverer.
The existence of a new planet conceived in 1821, when the data were published with a change in the orbit of Uranus, which were different from the values in the tables.
But only in the September 23, 1846, after two months of searching through mathematical calculations the orbit of Neptune was discovered.
he got his name because of mathematics, opening it (W. Leaver), who originally wanted to name the planet its name.
What is the most distant planet in the solar system?Description
Neptune constantly immersed in the twilight.Its brightness is 900 times smaller than our planet.The sun just seems to orbit the bright star.Located
giant at a distance of 4.55 billion kilometers, which is about 30 a.e. It has a lot to 17.15 times larger than Earth and the diameter - 4 times more.Its average density of only a half times higher than the water (1.6 g / cu. Cm).Thus, Neptune refers to a group of giant planets, which also includes Saturn, Jupiter and Uranus.
most distant planet in the solar system is also called the ice, because the mass of helium and hydrogen in its composition is not more than 15-20%.
Like other giants, Neptune at a tremendous speed spins on its axis.Twenty-four hours it are only 16.11 hours.Around the Sun it makes turnover of nearly circular orbit of 164.8 years.In 2011 he completed his first full rotation since the opening.
on the surface of Neptune's high winds prevail, the average velocity - 400 m / s.
Interestingly, the temperature of the planet is - 214 C when to be much lower.It is known that the most distant planet in the solar system has its own source of heat inside as it is 2.7 times more energy radiates into space than it absorbs from the sun.
constantly on the planet there is a change of the seasons.A season lasts about 40 years.
satellites
most distant planet in the solar system has 14 satellites.They are usually divided into three groups:
- Internal: Talas, Naiad, Galatea, Despina, Larissa Proteus;
- separately allocate Nereid and Triton;
- five foreign satellites do not have names.
The first group includes dark clumps, reaching 100-200 km and irregularly shaped.They rotate in almost circular orbit in the equatorial plane.They fly around the planet in just a few hours.
The second group includes Triton.This is a fairly large satellite.Its diameter - about 2700 km around Neptune full turn it makes 6 days.Spirals, slowly approaching the planet.Once it hits the Neptune and under the influence of tidal forces turn into another ring.Its surface is cold, it is believed that under the ice crust raging ocean.
Nereid giant flies over 360 days.It has an irregular shape.
External satellites are at a great distance (tens of millions of kilometers) from Neptune.The most remote flies around the world in 25 years.Considering their orbit inclination to the equatorial plane and reverse movement, it was decided that they were captured by Neptune in the Kuiper Belt objects.
In July 2013 opened last satellite.
Neptune has five rings of ice particles.Some of them are composed of carbon, so that they emit a red color.They are considered to be relatively young and short-lived.Neptune's rings are unstable and are significantly different from each other.
Interesting facts
Asked about that on some distant planet of the Solar System was launched the famous spacecraft "Voyazhder 2", can be said that initially he was sent to study Jupiter and Saturn, but the path has achieved as Uranus and Neptune.It was launched in 1977.
August 24, 1989, he flew 48 thousand. Km of Neptune.At this time on Earth have been sent pictures of the planet and its moon Triton.
In 2016 it was planned to send to another planet spacecraft.However, at present there is no exact dates run.
