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

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

We already knew interstellar comet 3I/ATLAS came from somewhere far beyond our solar system. Now scientists have more information on how alien that somewhere really is - a corner of the universe ...

A rocky planet nearly 50 light-years away appears to be airless, dark, and covered in volcanic or weathered rock, according ...

NASA’s James Webb Telescope captured the clearest view yet of a rocky exoplanet, revealing a scorching, airless world unlike ...

The finding offers fresh insight into our solar system’s farthest, coldest objects in a region known as the Kuiper Belt.

In the far reaches of our solar system - beyond the outermost planet Neptune - resides a host of icy and desolate celestial ...

Far beyond Neptune, scientists believe something massive may be hiding in the darkness of our solar system. Strange ...

For astrobiologists, the search for life beyond our solar system could be likened to where one would look in a vast desert—essentially, where there's water. And it turns out that one of the most ...

Learn more about the interstellar traveler, Comet 3I/ATLAS, and what researchers know about its place of origin.