Eris
2
8.6
- proper noun
- /ˈɛrɪs/
- Specialized
- Discovered in 2005, Eris is a dwarf planet located in the Kuiper belt beyond Neptune.
- Eris and Pluto
- dwarf planet Eris
- discovered Eris
Examples
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When Eris was discovered, it was thought to be larger than Pluto (IIUC, it is now considered to be a few km smaller in diameter).
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The astronomer pointed out that Eris is one of the largest known dwarf planets in our solar system.
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If so, then Eris should be a planet also.
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So, obviously Pluto and Eris are quantitatively different from those other objects, but is there a qualitative difference?
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Planetary status to Eris and all the rest would have drawn greater attention to the frontier of the outer solar system, and the link to exoplanets, which, like the KBOs, come in forms never seen before.
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However, whichever definition one settles upon will have implications for objects such as Ceres, Eris, Pluto, and Mercury, as well as implications about objects in the Edgeworth-Kuiper Belt that have either not been discovered or have been discovered but not yet adequately characterized.
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Scientists believe that Eris has a highly reflective surface, which allows it to reflect a large portion of sunlight.
Surface Forms
Etymology
The dwarf planet Eris was named after the same Greek goddess whose name means 'strife' or 'discord', because its discovery caused a big debate among astronomers about Pluto's status.