Ever since NASA's New Horizons sent back the first-ever photos of Pluto in 2015, the dwarf ... with another planetary body a little over 400 miles in diameter, roughly the size of Arizona from ...

Gaia-4b is considered a super-Jupiter planet, a relatively cold gas giant, orbiting its star over 570 Earth-days. That star ...

but it's big and spherical enough to be classified as a dwarf planet, just under half the size of Pluto. It's also quite an ...

Astronomers used a 3D global computer model to compare the climates of exoplanets in different stellar and orbital configurations. They found that a planet orbiting a white dwarf star would offer a ...

The “demoted” dwarf planet Pluto and its largest ... Our moon, for comparison, is about 27 percent of Earth’s size. (But that’s still closer to Charon and Pluto than other moon-planet ...

Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

Move over Saturn! Scientists have found a ring around an unassuming mini-planet in our Solar System to debunk the theory that only giant planets can be so adorned. The planet, dubbed Haumea ...

The dwarf planet is a bizarre, cryovolcanic world. However, the organic deposits discovered on its surface so far are unlikely to originate from its interior. The organic material found in a few ...