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

Astronomers don’t have to work hard to find binary stars in the Milky Way. They’re common, even abundant. For a long time, ...

In the early chaos of planetary formation, before crusts cooled or atmospheres settled, water might already have been bubbling into existence. Not fromicy comets or far-flung asteroids, but from the ...

A nearby Earth-sized planet offers a rare chance to study how atmospheres survive or disappear on rocky worlds.

An artist's impression of the planetary system surrounding LHS 1903, a small red dwarf star cooler and dimmer than our Sun. (European Space Agency) (CN) — For decades, astronomers thought they had ...

NASA’s TESS uncovers 11,554 exoplanet candidates in the T16 planet hunt, including more than 10,000 new ones around faint ...

NEW YORK (CNN) — An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, according to researchers who discovered it using telescopes from NASA and the ...

One way gas giants form is through core accretion, where solid cores gradually grow in a disk by pulling in rocky and icy pebbles until they become massive enough to attract the gas that surrounds ...