A rare interstellar comet is making a one-time pass through our solar system. It will never return after this ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

A massive interstellar object passing through our solar system during its formative years likely altered the orbits of planets into trajectories observed today, a new study says. Interactions with ...

It's been nearly a month since the second interstellar object, C/2019 Q4 (Borisov), was detected. And this newly identified object could potentially be studied, according to a new study. The research, ...

Comet 2I/Borisov, the second-ever discovered interstellar object, has a familiar look to it, similar to the other comets that are common throughout our solar system, according to a new study. This ...

The researchers analysed 295 kilograms of ice extracted from the European Project for Ice Coring in Antarctica (EPICA).

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Earth is quietly collecting radioactive debris from an ancient stellar explosion as our Solar System drifts through a giant ...

Interstellar travel could be possible, scientists say, but not in the way you might think. For decades, science fiction stories have proposed the idea of traveling outside of our known galaxy. This ...

As grad school approached for astrophysics senior Atsuhiro Yaginuma, he did not know what he wanted to study. That was until July 1, when the third ever interstellar object — a body originating from ...

The next time a space rock races through our solar system from beyond, humans will be a little more prepared to unlock its secrets. To date, astronomers have identified two interstellar objects that ...