Dwarf planets

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.

The famous 87-year-old telescope at Lowell Observatory that was used to discover Pluto needs to be renovated so it can seek out the dwarf planet once more.

On the surface of the dwarf planet Ceres, certain regions could be cold enough to host long-lasting deposits of water ice, a rarely- seen phenomenon on objects similar to Ceres, a new study shows.

Here are the biggest mysteries about the dwarf planet Ceres, according to the principal investigator of NASA's Dawn mission, which is studying the intriguing world up close.