Earth was mostly devoid of oxygen for much of its 4.5 billion year lifetime. That is, until certain processes started to ...

If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

TOI-199 b, a rare temperate giant planet, sits between scorching hot Jupiters and frozen gas giants, and JWST has found ...

The atmosphere is between 5 million and 10 million times thinner than Earth's atmosphere. A very small body, far from the sun in an icy outer realm of the solar system, has mysteriously grown an ...

That would have enabled more of this organic carbon—and carbonate accumulating in shallow water around Columbia—to be ...

A new study explains why carbon dioxide is cooling the upper atmosphere, even as it is warming Earth’s surface.

Pluto was believed to be the only body beyond Neptune with an atmosphere. Now, a new discovery in our solar system is ...

Pluto’s atmosphere is hard to observe from Earth. It can only be studied when Pluto passes in front of a distant star, allowing astronomers to see the effect the atmosphere has on starlight. When this ...

A planet that is about the size of Saturn, but with a temperature more like Earth's, has an atmosphere rich in methane, ...

A rare observation opportunity revealed the presence of a thin atmosphere around a small object beyond Pluto.

Earth’s surface is warming, but the upper atmosphere has been cooling for decades, and scientists now understand why.