| rdfs:comment | - Eris is one of the largest dwarf planets. It was very far away from the Sun, much farther than Neptune, Pluto, Haumea, and Makemake. It's classified as the Kuiper Belt object. It has one moon, Dysnomia. If you weight 100 lbs on Earth, you will weight only 17 lbs on Eris.
- Eris (pronounced /ˈɪərɨs/, or /ˈɛrɨs/ as in Greek Έρις),[a] formal designation 136199 Eris, is the second-largest known dwarf planet in the Solar System and the tenth-largest body known to orbit the Sun directly. It is approximately 2,368 kilometres in diameter and 27% more massive than Pluto.
- Eris is a dwarf planet in the outer Sol system, designated 136199. One of the first such bodies to be discovered by Humans, Eris' highly-inclined orbit meant that it spent part of its orbital period a significant distance from Sol and Earth. This remote location, along with Eris' relatively large size, proved to be perfect for the Federation Department of Temporal Investigations, which used the dwarf planet as the location of the Eridian Vault. Eris has one moon, Dysnomia, and was named for the ancient goddess of discord. (DTI novel: Watching the Clock)
- Eris (minor-planet designation 136199 Eris) is the most massive and second-largest dwarf planet known in the Solar System. It is also the ninth-most-massive known body directly orbiting the Sun, and the largest known body in the Solar System not visited by a spacecraft. It is measured to be in diameter. Eris is 27% more massive than dwarf planet Pluto, though Pluto is slightly larger by volume. Eris' mass is about 0.27% of the Earth's mass.
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| abstract | - Eris (minor-planet designation 136199 Eris) is the most massive and second-largest dwarf planet known in the Solar System. It is also the ninth-most-massive known body directly orbiting the Sun, and the largest known body in the Solar System not visited by a spacecraft. It is measured to be in diameter. Eris is 27% more massive than dwarf planet Pluto, though Pluto is slightly larger by volume. Eris' mass is about 0.27% of the Earth's mass. Eris was discovered in January 2005 by a Palomar Observatory–based team led by Mike Brown, and its identity was verified later that year. It is a trans-Neptunian object (TNO) and a member of a high-eccentricity population known as the scattered disk. It has one known moon, Dysnomia. As of February 2016, its distance from the Sun is astronomical unit (km; mi), roughly three times that of Pluto. With the exception of some comets, Eris and Dysnomia are currently the second-most-distant known natural objects in the Solar System, the farthest object being V774104 discovered in November 2015 at 103 AU. Because Eris appeared to be larger than Pluto, NASA initially described it as the Solar System's tenth planet. This, along with the prospect of other objects of similar size being discovered in the future, motivated the International Astronomical Union (IAU) to define the term planet for the first time. Under the IAU definition approved on August 24, 2006, Eris is a "dwarf planet", along with objects such as Pluto, Ceres, Haumea and Makemake, thereby reducing the number of known planets in the Solar System to eight, the same as before Pluto's discovery in 1930. Observations of a stellar occultation by Eris in 2010 showed that its diameter was , not significantly different from that of Pluto. After New Horizons measured Pluto's diameter as in July 2015, it was determined that Eris is slightly smaller in diameter than Pluto.
- Eris is one of the largest dwarf planets. It was very far away from the Sun, much farther than Neptune, Pluto, Haumea, and Makemake. It's classified as the Kuiper Belt object. It has one moon, Dysnomia. If you weight 100 lbs on Earth, you will weight only 17 lbs on Eris.
- Eris (pronounced /ˈɪərɨs/, or /ˈɛrɨs/ as in Greek Έρις),[a] formal designation 136199 Eris, is the second-largest known dwarf planet in the Solar System and the tenth-largest body known to orbit the Sun directly. It is approximately 2,368 kilometres in diameter and 27% more massive than Pluto. Eris was first spotted in January 2005 by a Palomar Observatory-based team led by Mike Brown, and its identity verified later that year. It is a trans-Neptunian object (TNO) native to a region of space beyond the Kuiper belt known as the scattered disc. Eris has one moon, Dysnomia; recent observations have found no evidence of further satellites. The current distance from the Sun is 96.7 AU, roughly three times that of Pluto. With the exception of some comets the pair are the most distant known natural objects in the Solar System. Because Eris is more massive than Pluto, its discoverers and NASA called it the Solar System’s tenth planet. This, along with the prospect of other similarly sized objects being discovered in the future, motivated the International Astronomical Union (IAU) to define the term planet for the first time. Under a then-new IAU definition approved on August 24, 2006, Eris is a "dwarf planet" along with Pluto, Ceres, Haumea and Makemake.
- Eris is a dwarf planet in the outer Sol system, designated 136199. One of the first such bodies to be discovered by Humans, Eris' highly-inclined orbit meant that it spent part of its orbital period a significant distance from Sol and Earth. This remote location, along with Eris' relatively large size, proved to be perfect for the Federation Department of Temporal Investigations, which used the dwarf planet as the location of the Eridian Vault. Eris has one moon, Dysnomia, and was named for the ancient goddess of discord. (DTI novel: Watching the Clock) The Last Unicorn RPG module: A Cadet's Guide to Sector 001 Earth dicusses a 10th planet in the Sol system named Prosperpine. The RPG was published years before the discovery of Eris.
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