Objects Encyclopedia Entry 1777869496
SUMMARY: The Kuiper Belt Object (KBO), also known as Eris, is a dwarf planet located in the outer reaches of the Solar System, discovered in 2005, and classified as a member of the Kuiper Belt, a region of icy bodies and small celestial objects beyond Neptune's orbit.
Overview
The Kuiper Belt is a vast, ring-shaped region of our Solar System, extending from the orbit of Neptune to a distance of approximately 55 astronomical units (AU) from the Sun. Within this region, numerous small, icy bodies and dwarf planets reside, including the Kuiper Belt Object (KBO), Eris. Eris was discovered on January 5, 2005, by a team of astronomers led by Michael E. Brown at the Palomar Observatory in California, USA. Initially thought to be the tenth planet in our Solar System, Eris was later reclassified as a dwarf planet due to its size and orbital characteristics.
Eris is a fascinating celestial body, with a highly eccentric orbit that takes it as close as 37.8 AU from the Sun and as far as 95.6 AU from the Sun. This unique orbit results in extreme temperature fluctuations, ranging from -233°C to -173°C (-391°F to -279°F), making it one of the coldest objects in our Solar System. Eris has a highly reflective surface, composed primarily of frozen methane and nitrogen ices, which gives it a distinct blue color.
History/Background
The discovery of Eris was a significant event in the field of astronomy, as it challenged our understanding of the Solar System's structure and classification of celestial bodies. Prior to Eris's discovery, the Kuiper Belt was thought to be a relatively empty region of our Solar System. However, the discovery of Eris and other KBOs revealed a complex and dynamic environment, with many small, icy bodies and dwarf planets residing in this region.
Key Information
* Size: Eris has a diameter of approximately 2,326 kilometers (1,445 miles), making it slightly larger than Pluto.
* Orbit: Eris has a highly eccentric orbit, taking it as close as 37.8 AU from the Sun and as far as 95.6 AU from the Sun.
* Surface: Eris has a highly reflective surface, composed primarily of frozen methane and nitrogen ices.
* Moons: Eris has one known moon, Dysnomia, which was discovered in 2005.
* Composition: Eris is thought to have a rocky core, surrounded by a mantle of frozen ices.
Significance
The discovery of Eris and other KBOs has significantly expanded our understanding of the Solar System's structure and evolution. Eris has also raised questions about the definition of a planet and the classification of celestial bodies. The discovery of Eris has also sparked interest in the exploration of the Kuiper Belt, with several spacecraft and missions planned to explore this region of our Solar System.
INFOBOX:
- Name: Eris
- Type: Dwarf Planet
- Date: January 5, 2005
- Location: Kuiper Belt
- Known For: Discovery of a new dwarf planet and reclassification of the Solar System's structure
TAGS: Kuiper Belt, Dwarf Planet, Eris, KBO, Solar System, Astronomy, Space Exploration, Celestial Bodies, Planetary Science
