This is only the third known interstellar object to pass through our cosmic neighborhood, following in the footsteps of ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

The monstrous 85-mile-wide comet C/2014 UN271 is the second most distant body originating from the Oort Cloud found to be ...

The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the Milky Way," a show at New York City's Hayden Planetarium that ...

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Scientists have unlocked one of the solar system's many secrets from an unexpected source: a planetarium show.

Passing stars could trigger instability across the solar system, resulting in Earth being hauled out of its orbit.

The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the Milky Way," a show at New York City's Hayden Planetarium that ...

It appears our solar system is getting more popular with out-of-towners. Astronomers have found a third interstellar object, ...

A team of astronomers has made a groundbreaking discovery by detecting molecular activity in comet C/2014 UN271 ...

An accidental discovery might change how we think about one of the most mysterious structures in our solar system. The Oort ...