Dwarf Planets

NASA's Dawn mission to the main asteroid belt, granted a second extended mission earlier this year, will end later next year after a final set of close-up observations of the dwarf planet Ceres.

Ceres' bright patches may overlie pools of salty water, which could be the remnants of an ancient, subsurface ocean.

The pull of Ceres on NASA's Dawn spacecraft hints at an ancient ocean that may have left traces today.

NASA's Dawn spacecraft has been granted a mission extension that will allow it to continue to study the dwarf planet Ceres until it runs out of fuel sometime in 2018.

Scientists have discovered a ring system around the dwarf planet Haumea.

The dwarf planet 2007 OR10, informally known as "Snow White," has a moon that's between 150 miles and 250 miles (240 to 400 kilometers) wide, a new study reveals.

The dwarf planet Ceres shines and spins in a new video captured by NASA's Dawn spacecraft.

NASA's Dawn spacecraft has lost another orientation-maintaining reaction wheel, but the failure doesn't threaten the probe's continuing work at the dwarf planet Ceres, agency officials said.