Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

A cosmic tourist just dropped by our solar system, and it’s putting on quite the show. Astronomers are dazzled with a spectacular display of ice and dust jets as an interstellar visitor known as ...

Our solar system’s interstellar visitor – 3I/ATLAS – apparently has ‘jet thrusters’, a scientist has suggested. The comet is the third time an object not from our star system has wound up in our ...

The mystery surrounding 3I/ATLAS has taken another wild turn, as new observations suggest the “Manhattan-sized” object is accelerating in ways scientists can’t fully explain and, stranger still, it’s ...