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

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

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: ...

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 ...

Using gravitational microlensing, scientists have discovered a rare, large planet at the edge of the Milky Way. The planet is ...

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

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 ...

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.

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

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

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 ...