By comparison, the diameter of Earth's moon is about 2,160 miles (3,475 km). Because of its greater concentration of rock, which is denser than ice, Eris has about 25% more mass than Pluto.

The moons of both offer a key to understanding ... But Dysnomia’s size is large enough to exert a significant influence on its parent body, Eris. Francis Nimmo, a planetary scientist at the ...

Eris and its satellite are mutually tidally locked, which means both face the same way toward each other. Scientists think this is because the tiny moon "raises" tides on Eris, causing the dwarf ...

Two main pieces of information led to their results. The first important clue is that Eris and its moon, Dysnomia, always face the same way toward each other. “That happens because the big planet gets ...

New research suggests Pluto may have had a “kiss” with its largest moon billions ... such as the dwarf planets Eris and Orcus and their respective moons Dysnomia and Vanth.

Denton and colleagues found that two other pairs of objects, dwarf planet Eris and its moon Dysnomia and dwarf planet Orcus and its moon Vanth, could also be explained by “kiss-and-capture ...

Eris and Makemake are comparable in size to Pluto and its moon Charon. These bodies likely formed early in the history of our solar system, about 4.5 billion years ago. Far from the heat of our ...

The dwarf planets Eris and Haumea are believed to be ... a mini-Neptune 2000 light years away, or on a cold moon orbiting Saturn inside its rings. Before joining Popular Mechanics in 2022, Manasee ...

"Charon then begins its slow outward migration towards its ... applies to the other large Kuiper Belt Objects with large moons, like Eris and Dysnomia, Orcus and Vanth, and the others," Denton ...