Dwarf Planets

Ceres, the closest dwarf planet to Earth, may be wrinkling as it shrinks.

Haumea's ring is too faint to be seen from planet Earth, so astronomers have turned to context clues to find out more about these particles.

The only mountain on Ceres may slowly disappear over a few hundred million years, spreading out like honey on a plate.

Pluto's status as a "dwarf planet" is once again stirring debate. This comes as some planetary scientists are trying to have Pluto reclassified as a planet – a wish that's not likely to come true.

The location of newfound water-ice deposits on Ceres are linked to wild swings in the dwarf planet's tilt over the eons, a new study suggests.

On the dwarf planet Ceres, volcanoes rage — but instead of hot lava coming out of them as on Earth, they spew brine and ice.

NASA's Dawn spacecraft has spotted organic molecules — the carbon-containing building blocks of life — on Ceres for the first time, a new study reports.