![]() ![]() Regarding its dimensions, Neptune has a mass of more than 17 times the Earth and a volume equivalent to 57 times our planet. It is an enormously dense planet, with a diameter of 49,572 km. This makes it the fourth planet with the largest diameter and the third with the largest mass in the entire Solar System. Neptune has a volume equivalent to 57 times our planet. Galileo Galilei ‘s drawings reveal that Neptune had somehow been glimpsed, but mistaken for a star . The planet is considered to have been discovered in the 19th century , thanks to the studies of the orbit of Uranus by Alexis Bouvard and then John Couch Adams, who respectively observed anomalies in it and calculated the orbit of a possible eighth planet. Urbain Le Verrier in 1846 mathematically confirmed these calculations and calculated the position of the planet on September 23 of the same year. Neptune was discovered thanks to the studies of Alexis Bouvard. Neptune is in orbit around the Sun, like all the other planets of the Solar System, at 4,498,116,480 kilometers from the star king (about 4,350,000,000 km from Earth ), in the following orbit of Uranus. Its orbit takes 165 Earth years to complete one revolution around the Sun. Neptune was considered the farthest planet in the Solar System until the discovery of Pluto in 1930 , until in 2006 it regained its title, as Pluto came to be considered a dwarf planet or planetoid. Together with Uranus, they have been classified as the “icy giants” of the Solar System , since their orbits are too far from the Sun to maintain temperatures even close to 0 ☌. However, Neptune is slightly larger than Uranus and considerably denser. ![]() ![]() Neptune is the eighth planet in the Solar System and the farthest from the Sun , which is part of the outer planets or gas giants. It was also the first to be discovered thanks to mathematical operations, based on the orbital behavior of Uranus, Saturn and Jupiter . Its name comes from the Roman god of the oceans , called by the Greeks Poseidon . It is 38.87 times bigger and 17.132 times more massive than the Earth.We explain everything about Neptune, where it is located and what its satellites are. In addition, its characteristics, composition and observations. It's atmosphere is dominantly hydrogen (80 per cent), with helium (19 per cent) and methane (1 per cent), and a very small admixture of other compounds. Neptune has 13 satellites, and a thin ring system that was discovered in 1984. The planet was discovered on Septemby Johann Galle and Heinrich d’Arrest from Berlin Observatory very near the predicted position, Devgun said. John Adams and Urbain Le Verrier carried out independent analysis of discrepancies in the observed and calculated positions of Uranus and predicted in 1845 the mass and orbit of the perturbing body. Unexplained deviations in the orbit of the planet Uranus, ever since its accidental discovery on Maby William Herschel, led astronomers to believe that there was some unknown body farther out. Neptune is also the first planet found by mathematical prediction rather than by observation, C B Devgun of SPACE said. Neptune will be in opposition on August 22, 2011, which means it will rise around when the sun sets in the west and shall be up all night, he said. To watch the planet, see Capricornus and Aquarius constellations between the stars Delta Capricorni and Lambda Aquari to be precise, he said, adding, one needs a moderate sized telescope to view it. The heavenly body will celebrate its birthday on July 13 at 03:06 IST when it reaches approximately the same heliocentric longitude 329°.1020 as at the time of its discovery, R C Kapoor of Indian Institute of Astro Physics said. ![]()
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