Dwarf planets

NASA's New Horizons spacecraft flew past Pluto in the July 2015, snapping several photos of the dwarf planet and its giant, heart-shaped geographical feature.

The dwarf planet Ceres may once have harbored many ice volcanoes, all but one of which have flattened out and vanished into the dwarf planet's surface, a new study suggests.

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.