Eris (dwarf planet)
Videos
Eris is the most massive and second-largest-known dwarf planet in the Solar System. It is a trans-Neptunian object in the scattered disk and has a high-eccentricity orbit. Eris was discovered in Janua
Low-resolution image of Eris and Dysnomia as imaged by the James Webb Space Telescope's NIRCam on 23 August 2024
Eris and its moon Dysnomia imaged by Hubble Space Telescope on August 30, 2006. Dysnomia's orbit around Eris labeled.
Illustration of the stellar occultation by Eris in November 2010. The resulting occultation chords project a circular silhouette for Eris, giving a spherical diameter of 2,326 km (1,445 mi).
Eris as taken by the Hubble Space Telescope. This image is one of the clearer shots of Eris.
Dysnomia (moon)
Videos
Dysnomia, formal designation Eris I, is the only known moon of the dwarf planet Eris and is the second-largest known moon of a dwarf planet, after Pluto I Charon. It was discovered in September 2005 b
Eris (dwarf planet)
…larger by volume. Both Eris and Pluto have a surface area that is comparable to that of Russia or South America. Eris has one large confirmed moon, Dysnomia, and it might have another much larger moon. In February 2016, Eris's distance from the Sun was 96.3 AU (14.41 billion km; 8.95 billion mi), more than…
Discovery image of Dysnomia
Artist's conception of Dysnomia's dark surface, with dwarf planet Eris in the background