In July 2025, astronomers spotted something remarkable passing through our Solar System, an object that had not come from ...

A comet screaming in from another star system carried alien ice ratios never seen before. What scientists found inside its spinning nucleus is reshaping how we picture worlds beyond our sun.

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

One year ago, on July 1, 2025, astronomers discovered a fascinating new object moving through the solar system. Detected by the Asteroid Terrestrial-impact Last Alert System (ATLAS), the object was ...

"Eventually, our own Voyager spacecraft will be extraterrestrial artifacts in other stellar systems." ...

I/ATLAS arrived fast, bright, and strange. When astronomers spotted it on July 1, 2025, they knew almost immediately this was no ordinary comet.

Harvard astrophysicist Avi Loeb argues 3I/ATLAS and other interstellar objects may hint at alien technology, drawing fame, ...

WD 1856 b circles the burnt-out core of a dead star at a distance that seems almost impossible. The giant planet skims around ...

Scientists have identified interstellar comet 3I/ATLAS as the oldest known object to pass through the solar system, dating ...

Interstellar comet 3I/ATLAS, the third known object to enter our solar system from another star, underwent a dramatic ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the third known interstellar comet ever spotted. When scientists turned NASA’s ...

Harvard astrophysicist Avi Loeb argues 3I/ATLAS and other interstellar objects may hint at alien technology, drawing fame, funding, and fierce criticism.