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

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 ...

I/ATLAS arrived fast, bright, and strange. When astronomers spotted it on July 1, 2025, they knew almost immediately this was ...

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

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 ...

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

The planets are extremely large, with TOI-791 b being about the same size as Jupiter, and TOI-791 c even larger. Yet, they ...

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.

SETI may have missed alien signals for 60 years because stellar plasma smears transmissions into noise, a new Astrophysical ...