The internal structure of Eris inferred from its spin and orbit evolution. Recently obtained bounds on the mass of Dysnomia demonstrate that Eris must be unexpectedly dissipative for it to have despun over the age of the solar system.

The internal structure of Eris inferred from its spin and orbit evolution. Recently obtained bounds on the mass of Dysnomia demonstrate that Eris must be unexpectedly dissipative for it to have despun over the age of the solar system.