Eris
E·ris
E0199100 (îr′ĭs, ĕr′-)Eris
(ˈɛrɪs)Eris
(ˈɛrɪs)E•ris
(ˈɪər ɪs, ˈɛr ɪs)n.
| Noun | 1. | Eris - (Greek mythology) goddess of discord; sister of Ares |
| 单词 | eris | |||||||||||||
| 释义 | ErisE·risE0199100 (îr′ĭs, ĕr′-)Eris(ˈɛrɪs)Eris(ˈɛrɪs)E•ris(ˈɪər ɪs, ˈɛr ɪs)n.
ErisEris(ē`rĭs), in Greek religion, goddess of strife. Angered at not being invited to the wedding of Peleus and Thetis, she threw the apple of discord among the wedding guests (see ParisParisor Alexander, in Greek mythology, son of Priam and Hecuba and brother of Hector. Because it was prophesied that he would cause the destruction of Troy, Paris was abandoned on Mt. Ida, but there he was raised by shepherds and loved by the nymph Oenone. ..... Click the link for more information. , in Greek mythology). Eris,in astronomy, the largest known dwarf planetdwarf planet,a nonluminous body of rock or gas that orbits the sun and has a rounded shape due to its gravity. Unlike a planet, a dwarf planet is not capable of clearing its orbit of smaller objects by collision, capture, or other means. ..... Click the link for more information. . Eris, whose highly eccentric elliptical orbit ranges from 38 AU to 97 AU and is inclined more than 44°, is the largest known object of the Kuiper belt (see cometcomet [Gr.,=longhaired], a small celestial body consisting mostly of dust and gases that moves in an elongated elliptical or nearly parabolic orbit around the sun or another star. Comets visible from the earth can be seen for periods ranging from a few days to several months. ..... Click the link for more information. ), with a diameter (1,445 mi/2,317 km) slightly larger than that of Pluto. Taking 560 earth years to circle the sun, Eris is believed to be composed of rock and ice. At aphelion (the most distant point from the sun in Eris's orbit), where the temperature is −405°F; (−243°C;), Eris's surface is covered with highly reflective frozen methane, which forms its atmosphere when it is closer to the sun and the surface temperature is warmer (−360°F;/−218°C;). Eris was discovered on Jan. 5, 2005, by astronomers Mike Brown, Chad Trujillo, and David Rabinowitz, using computer analysis of images taken two years earlier in a survey of the Kuiper belt. It was named for the Greek goddess of strife because its discovery was a catalyst for the reclassification of PlutoPluto, in astronomy, a dwarf planet and the first Kuiper belt, or transneptunian, object (see comet) to be discovered (1930) by astronomers. Pluto has an elliptical orbit usually lying beyond that of Neptune. ..... Click the link for more information. as a dwarf planet. Eris is known to have one natural satellite, Dysnomia, named for the daughter of the goddess Eris; the moon is estimated to have a diameter about an eighth that of Eris. Eris and its moon were nicknamed Xena and Gabrielle, respectively, before they were officially named. ErisErisSee Church of the SubGenius. ERIS
Eris
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