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

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

Interstellar visitor Comet 3I/ATLAS was discovered just a week ago and ever since, astronomers across the world have been ...

There's a new interstellar comet in the neighborhood! Known as 3I/ATLAS, this comet poses no threat to Earth – but it does ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

Our solar system may have a ninth planet after all, ... Several planets found orbiting star less than 6 light-years away. ... Binary star system found near the Milky Way's black hole: ...

For only the third time in history, astronomers have detected a new interstellar visitor — an object from another star — blitzing into our solar system.

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

Newfound interstellar object 3I/ATLAS may be carrying pristine material from early in the Milky Way’s star-forming history.

A newly discovered object, dubbed A11pl3Z, appears to be moving too fast and straight to have originated in the solar system.

Our solar system has eight major planets and has been around for more than four billion ... our solar system’s 4.6-billion-year history offers a long time for shedding worlds into the Milky Way.

Over the past decade or so, astronomers have speculated about the characteristics of rogue planets in the Milky Way galaxy. These "free-floating" worlds don't orbit stars, but instead roam the ...