The mini-Neptune survived rather than get bundled out of the way by the marauding hot Jupiter because the two metaphorically ...

A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere that may have been created by ...

A scorching, airless world just 48 light-years away is offering scientists a rare glimpse into the geology of distant planets ...

The galaxy’s most common stars rarely host sub-Neptune planets, revealing a new pattern in how close-in worlds form.

Astronomers have detected the chemical fingerprint of a frozen, water-rich planetary fragment being devoured by a white dwarf star, offering the clearest evidence yet that icy, life-delivering objects ...

The James Webb Space Telescope's (JWST) exoplanet subject, LHS 3844 b, is a so-called "super-Earth" about 30% larger than our ...

Is Pluto a planet? At a U.S. Senate committee hearing this week, NASA's chief shared his thoughts on the decades-long debate.

About 20 years ago, leading astronomers decided that Pluto was too small to be a planet, undoubtedly giving it a Napoleonic ...

New research suggests that billions of years ago, the dwarf planet Ceres may have had water, organic molecules, and chemical energy — the key ingredients for life. NASA’s Dawn mission data reveals ...

The celestial body’s status as the solar system's ninth planet was withdrawn in 2006. Now some experts say we might want to ...

When NASA’s Dawn spacecraft arrived at Ceres in 2015, it revealed a dwarf planet far more complex than scientists expected.