Dwarf planets

Mysterious dark reddish spots along Pluto's equator may be the aftermath of the giant impact that helped form the dwarf planet's largest moon Charon, a new study finds.

The dwarf planet Ceres is cloaked in a layer of asteroid dust that disguises its true surface composition, a new study suggests.

A new color movie combines more than 100 images taken by NASA's New Horizons spacecraft during the probe's historic Pluto flyby in the summer of 2015.

The dwarf planet Ceres still holds pockets of ice from billions of years ago, new observations by NASA's Dawn spacecraft show.

Water ice exists on the surface of Ceres, new observations have confirmed. The water ice is harbored in regions on the surface of this massive asteroid that are permanently cloaked in shadow.

NASA's Dawn probe is snapping stunning new views of the dwarf planet Ceres as the spacecraft pushes ever higher above the small world.

A new face has been added to the solar system's family portrait: Scientists have discovered a new dwarf planet looping around the sun in the region beyond Pluto.

Pluto may be sharing its atmosphere with its largest moon, Charon, creating the visually striking red spot at the satellite's north pole.