The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.

Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

Unfortunately for science fiction fans, desert worlds outside our solar system are unlikely to host life, according to new ...

NASA unveiled a new telescope on Tuesday to scan vast swaths of the universe for planets outside our solar system and probe ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

Scientists have discovered unexpected water-ice clouds on a distant, Jupiter-like exoplanet, challenging current atmospheric ...

A strange planetary system called TOI-201 is changing in real time, with three very different worlds pulling on each other.

It is a question that feels like it should have a straightforward answer: how many planets are there in our solar system? Since Pluto was relegated back down to dwarf planet status, almost everyone ...

TUCSON, Ariz. (KVOA) - Astronomers have confirmed a new planet in one of the youngest solar systems ever found, thanks to University of Arizona technology. The system, called WISPIT 2, was first ...

Titan is the largest of Saturn’s 292 known moons, by far. It’s also the only other cosmic body apart from Earth confirmed to ...