Two of Pluto's midsize moons may be made of the guts of its largest moon, Charon, new research suggests.
New observations with the James Webb Space Telescope (JWST) show that the two moons, Nix and Hydra, are more similar to the interior of Charon than to other objects in the surrounding Kuiper Belt. The findings hint that the midsize satellites may be composed of the bits of Charon's interior that were ejected during the rough collision that formed Pluto and Charon.
