Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

The astronomical community is abuzz over a newly discovered "interstellar object," only the third of its kind ever seen, ...

Scientists now say an interstellar comet discovered earlier this month could be one of the oldest that astronomers have ever ...

What at first seemed a routine detection of an object travelling through the solar system soon turned out to be anything but.

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it ...

Centimeter-sized pebbles have been detected in protoplanetary discs using e‑MERLIN, filling in a critical phase of planet ...

A newly discovered ice comet from deep space may be over 7 billion years old, making it the most ancient comet scientists ...

Astronomers have discovered yet another alien visitor to the Solar System.

Captured just days after its discovery, the images offer the clearest view yet of this rare visitor from beyond our solar system.

A rare interstellar comet is flying through our solar system. Here's how—and when—you might be able to see Comet ATLAS from ...

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.