“Eris”的概念、定义、翻译、参考文献-科学参考

Eris

Astronomy

The first trans-Neptunian object found with a diameter similar to that of Pluto, and one of the largest dwarf planets; also known as minor planet (136199). Eris is 2326 km in diameter, has a mean density of 2.5 g/cm³ and a mass 1.3 times that of Pluto. Infrared spectroscopy reveals the presence of methane ice on its surface. Eris has a satellite, Dysnomia, about 0.3 its diameter, which orbits it every 15.8 days. Eris was discovered in 2005 by the American astronomers Michael Edwards Brown (1965– ), Chadwick Aaron Trujillo (1973– ), and David Lincoln Rabinowitz (1960– ). Its orbit has a perihelion of 37.7 au, aphelion 97.6 au, inclination 44°.2, and period 556.6 years, placing it among the scattered-disk objects.

Geology and Earth Sciences

The most massive solar system dwarf planet, discovered in January 2005 by astronomers at the Palomar Observatory, Eris has a diameter of 2326 km and its density is 2.52 ± 0.05 g/cm3. It has about 0.27% of the Earth’s mass and is 27% more massive than Pluto, but about the same size. It has one known moon, Dysnomia. Eris has a highly eccentric orbit that brings it to 37.7 astronomical units (AU) from the Sun and as far as 97.5 AU. It has an orbital period of 556.6 years. Its albedo of 0.96 makes it the second brightest object in the solar system after Enceladus. Infrared spectroscopy reveals the presence of methane ice on its surface.

单词	Eris
释义	Eris Astronomy The first trans-Neptunian object found with a diameter similar to that of Pluto, and one of the largest dwarf planets; also known as minor planet (136199). Eris is 2326 km in diameter, has a mean density of 2.5 g/cm³ and a mass 1.3 times that of Pluto. Infrared spectroscopy reveals the presence of methane ice on its surface. Eris has a satellite, Dysnomia, about 0.3 its diameter, which orbits it every 15.8 days. Eris was discovered in 2005 by the American astronomers Michael Edwards Brown (1965– ), Chadwick Aaron Trujillo (1973– ), and David Lincoln Rabinowitz (1960– ). Its orbit has a perihelion of 37.7 au, aphelion 97.6 au, inclination 44°.2, and period 556.6 years, placing it among the scattered-disk objects. Geology and Earth Sciences The most massive solar system dwarf planet, discovered in January 2005 by astronomers at the Palomar Observatory, Eris has a diameter of 2326 km and its density is 2.52 ± 0.05 g/cm3. It has about 0.27% of the Earth’s mass and is 27% more massive than Pluto, but about the same size. It has one known moon, Dysnomia. Eris has a highly eccentric orbit that brings it to 37.7 astronomical units (AU) from the Sun and as far as 97.5 AU. It has an orbital period of 556.6 years. Its albedo of 0.96 makes it the second brightest object in the solar system after Enceladus. Infrared spectroscopy reveals the presence of methane ice on its surface.
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