Why has silicon, one of the most common elements in the universe, gone largely undetected in the atmospheres of Jupiter, ...

New research using NASA's powerful JWST telescope has identified a planet 41 light years away which may have an atmosphere.

We currently know of more than 5,800 planets beyond the solar system, but we've only found the tiniest fraction of the exoplanets that astronomers think lie elsewhere in the universe.

But that doesn't necessarily mean planets are perfect spheres. "We call them round, but they're not really perfectly round, including our own Earth," Amirhossein Bagheri, a planetary science and ...

A radical new theory regarding the origin of the universe suggests that gravitational waves, tiny ripples in spacetime first ...

Gravity not only holds us firmly to the ground but also anchors oceans, keeps the atmosphere in place, and binds planets and ...

Chemistry in the first 50 million to 100 million years after the Big Bang may have been more active than we expected.

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

Astronomers have found planets that are twice as wide as Jupiter and more than 10 times as heavy, but there's a limit to how big planets can get.

Billions of galaxies are in the universe, with billions of stars in every galaxy. Could billions of planets be out there too?