Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's not aliens.) ...

Harvard astronomer Avi Loeb suggests that if interstellar object 3I/ATLAS isn't a comet, nor an asteroid, it may have been ...

As astronomers rush to study a newly discovered comet from beyond our solar system, a powerful new observatory may turn rare ...

Scientists discover 3I/ATLAS, a possible 7-billion-year-old comet from deep space. It may rewrite what we know about the ...

Astronomers are scrambling to gather data on a mysterious object that’s currently hurtling through the solar system.

By Will Dunham WASHINGTON (Reuters) -Astronomers are tracking a newly spotted comet hailing from parts unknown, only the ...

Comet 31/ATLAS is only the third interstellar object to ever be observed whizzing through the Solar System. While its origins ...

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It was first discovered zipping near the sun this fall.

Astronomers have been trying to understand the mysterious interstellar object that zipped through our solar system in 2017, dubbed ‘Oumuamua. A new study suggests answers about its color ...