Somewhere in the galaxy, in a place colder than anything our solar system has ever produced, a ball of ice took shape.

Interstellar planets — those without stars to orbit — could serve as havens for life, according to a new study. Subscribe to read this story ad-free Get unlimited access to ad-free articles and ...

Since the dawn of the solar system, rocky visitors from deep space have blazed across Earth’s skies. When will the next asteroid or interstellar object make its pass by our planet?

Interstellar objects like 3I/ATLAS that have been captured in planet-forming discs around young stars could become the seeds of giant planets, bypassing a hurdle that theoretical models have ...

The first known visitor from interstellar space, 'Oumuamua, was likely a pancake-shaped chip off a Pluto-like world, researchers say. These findings may shed light on the stuff a new class of planet, ...