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Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It was the first and the largest Kuiper belt object to be discovered. After Pluto was discovered in 1930, it was declared to be the ninth planet from the Sun. Beginning in the 1990s, its status as a planet was questioned following the discovery of several objects of similar size in the Kuiper belt and the scattered disc, including the dwarf planet Eris. This led the International Astronomical Union (IAU) in 2006 to formally define the term "planet"—excluding Pluto and reclassifying it as a dwarf planet.
Charon, known as (134340) Pluto I, is the largest of the five known natural satellites of the dwarf planet Pluto. It has a mean radius of 606 km (377 mi). Charon is the sixth-largest known trans-Neptunian object after Pluto, Eris, Haumea, Makemake and Gonggong. It was discovered in 1978 at the United States Naval Observatory in Washington, D.C., using photographic plates taken at the United States Naval Observatory Flagstaff Station (NOFS).
Pluto is a cartoon character created in 1930 by The Walt Disney Company. He is a yellow-orange color, medium-sized, short-haired dog with black ears. Unlike most Disney characters, Pluto is not anthropomorphic beyond some characteristics such as facial expression. He is Mickey Mouse's pet. Officially a mixed-breed dog, he made his debut as a bloodhound in the Mickey Mouse cartoon The Chain Gang. Together with Mickey Mouse, Minnie Mouse, Donald Duck, Daisy Duck, and Goofy, Pluto is one of the "Sensational Six"—the biggest stars in the Disney universe. Though all six are non-human animals, Pluto alone is not dressed as a human.
Pluto is the ruler of the underworld in classical mythology. The Greek name for the god was Hades, which became more common as the name of the underworld itself. In ancient Greek religion and mythology, Pluto represents a more positive concept of the god who presides over the afterlife. Ploutōn was frequently conflated with Ploutos, the Greek god of wealth, because mineral wealth was found underground, and because as a chthonic god Pluto ruled the deep earth that contained the seeds necessary for a bountiful harvest. The name Ploutōn came into widespread usage with the Eleusinian Mysteries, in which Pluto was venerated as both a stern ruler and a loving husband to Persephone. The couple received souls in the afterlife and are invoked together as Plouton and Kore in religious inscriptions.
New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program. Engineered by the Johns Hopkins University Applied Physics Laboratory (APL) and the Southwest Research Institute (SwRI), with a team led by S. Alan Stern, the spacecraft was launched in 2006 with the primary mission to perform a flyby study of the Pluto system in 2015, and a secondary mission to fly by and study one or more other Kuiper belt objects (KBOs) in the decade to follow, which became a mission to 486958 Arrokoth. It is the fifth space probe to achieve the escape velocity needed to leave the Solar System.
Hydra is a natural satellite of Pluto, with a diameter of approximately 51 km (32 mi) across its longest dimension. It is the second-largest moon of Pluto, being slightly larger than Nix. Hydra was discovered along with Nix by astronomers using the Hubble Space Telescope on 15 May 2005, and was named after the Hydra, the nine-headed underworld serpent in Greek mythology. By distance, Hydra is the fifth and outermost moon of Pluto, orbiting beyond Pluto's fourth moon Kerberos.
The dwarf planet Pluto has five natural satellites. In order of distance from Pluto, they are Charon, Styx, Nix, Kerberos, and Hydra. Charon, the largest of the five moons, is mutually tidally locked with Pluto, and is massive enough that Pluto–Charon is sometimes considered a double dwarf planet.
Pluto is a fictional deity appearing in American comic books published by Marvel Comics. The character is based on the Greco-Roman god of the same name.
A dwarf planet is a planetary-mass object that does not dominate its region of space and is not a satellite. That is, it is in direct orbit of the Sun and is massive enough to be plastic – for its gravity to maintain it in a hydrostatically equilibrious shape – but has not cleared the neighborhood of its orbit of similar objects. The prototype dwarf planet is Pluto. The interest of dwarf planets to planetary geologists is that, being possibly differentiated and geologically active bodies, they may display planetary geology, an expectation borne out by the 2015 New Horizons mission to Pluto.
The International Astronomical Union (IAU) defined in August 2006 that, in the Solar System, a planet is a celestial body which:
- is in orbit around the Sun,
- has sufficient mass to assume hydrostatic equilibrium, and
- has "cleared the neighborhood" around its orbit.
Styx is a small natural satellite of Pluto whose discovery was announced on 11 July 2012. It was discovered by use of the Hubble Space Telescope. As of 2020, it is the smallest known moon of Pluto. It was imaged along with Pluto and Pluto's other moons by the New Horizons spacecraft in July 2015, albeit poorly with only a single image of Styx obtained.
Dorcadion is a genus of longhorn beetles of the subfamily Lamiinae, containing the following species:
Pluto TV is a U.S. internet television service owned and operated by ViacomCBS Streaming, a division of ViacomCBS. Co-founded by Tom Ryan, Ilya Pozin and Nick Grouf in 2013 and based in Los Angeles, California, Pluto is a advertiser-supported video on demand (AVOD) service that primarily offers a selection of programming content through digital linear channels designed to emulate the experience of traditional broadcast programming. The service's revenue is generated from video advertisements seen during programming within ad breaks structured similarly to those found on conventional television.
Dorcadion arietinum is a species of beetle in the family Cerambycidae. It was described by Jakovlev in 1897.
Dorcadion divisum is a species of beetle in the family Cerambycidae. It was described by Ernst Friedrich Germar in 1839. It is known from Greece and Turkey.
Dorcadion cinerarium is a species of beetle in the family Cerambycidae. It was described by Johan Christian Fabricius in 1787, originally under the genus Lamia. It is known from Ukraine, Azerbaijan, and Russia.
Dorcadion scabricolle is a species of beetle in the family Cerambycidae. It was described by Dalman in 1817. It is known from Azerbaijan, Iran, Armenia, and Turkey.
Dorcadion almarzense is a species of beetle in the family Cerambycidae. It was described by Escalera in 1902. It is known from Spain.
Dorcadion fuliginator is a species of beetle in the family Cerambycidae. It was described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae. It is known from Spain, Belgium, Luxembourg, Netherlands, Portugal, France, Germany, Austria, Lithuania, and Switzerland.
Dorcadion marmottani is a species of beetle in the family Cerambycidae. It was described by Escalera in 1900. It is known from Spain.
References
- ↑ BioLib.cz - Dorcadion pluto. Retrieved on 8 September 2014.