Eris is the largest known dwarf planet in the solar system. It is a trans-Neptunian object (TNO), orbiting the Sun in a region of space known as the scattered disc, just beyond the Kuiper belt ...

The discovery of Eris in the Kuiper Belt beyond Neptune in 2005 prompted the debate that ultimately reclassified Pluto as a dwarf planet. It was an interest in Pluto that drew UC Santa Cruz ...

Dwarf planet Eris, similar in size to its better-known cosmic cousin Pluto, has remained an enigma since being discovered in 2005 lurking in the solar system's far reaches. While Pluto was ...

On Jan. 5, 2005, Eris was discovered. It was considered the largest known dwarf planet in the solar system until a year later when Pluto was downgraded from being a planet.

Their great distance from the Sun —– Eris is currently 14.4 billion kilometers (8.9 billion miles) away and Makemake is 7.7 billion kilometers (4.8 billion miles) away – means little is ...

Icy rocks in the outer solar system might have unexpected subsurface oceans. Eris and Makemake are both dwarf planets in the Kuiper belt – the ring of frozen objects that encircles our solar ...

University of California, Santa Cruz Professor of Planetary Sciences Francis Nimmo recently co-authored a Science Advances paper about the internal structure of the dwarf planet Eris.