Interstellar comet 3I/ATLAS is just the third such object ever confirmed to have entered our solar system. It has attracted ...

The interstellar object 3I/ATLAS is thought to be roughly 7 billion years old, making it even older than our solar system.

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, ...

Voyager 1 has been exploring the cosmos for decades, but when it reached the edge of the solar system, it found something ...

Space scientists look back on three decades of exoplanet discoveries—from rows of massive ‘super-Earths‘ to worlds with ...

In our own solar system, there are pretty good odds that you could stand on the surface of an asteroid and not even be able ...

Debris disks are circumstellar structures composed of dust and rocky debris generated by collisions among planetesimals and other small bodies. These disks offer a direct window into the dynamical ...

3I/ATLAS, an interstellar object currently zipping through the solar system, is capturing the attention of astronomers, the ...

Harvard researcher Avi Loeb says comet 3I/ATLAS weighs 33 billion tons and spans 3.1 miles, making it far larger than ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its ...