NASA has responded to speculation that mysterious interstellar object 3I/ATLAS is actually an alien starship preparing to invade Earth.

I/ATLAS is a fast, ancient interstellar object. Its odd features fuel both scientific study and speculation. On July 1, ...

Astrophysicist Avi Loeb, the former chairman of Harvard's Department of Astronomy and current head of Harvard's Galileo Project, which searches for ...

NASA has firmly debunked a Harvard astronomer's suggestion that an interstellar comet passing through our solar system might ...

NASA's James Webb Space Telescope has made its first observations of interstellar comet 3I/ATLAS, revealing that the comet appears to be unusually rich in carbon dioxide.

But over the summer, 3I/ATLAS, has plunged toward the inner solar system—and the fireworks show has begun in earnest. When ...

The images of Comet 3I/ATLAS were captured by the Gemini South telescope at Cerro Pachón in Chile on Aug. 27 as the icy ...

According to Dean Duffy, the new NASA administrator, a rock sample collected by the Perseverance rover was the "clearest sign ...

The comet, which poses no risk to Earth, first burst onto the scene July 1, spotted by NASA’s ATLAS survey telescope in Chile ...

We already knew that interstellar comet 3I/ATLAS was different from the other two interstellar objects known to have ...

Named 3I/ATLAS, the comet is only the third known interstellar object to enter our solar system, and it's the largest and ...

I/ATLAS was discovered on July 1 by the Asteroid Terrestrial-impact Last Alert System (ATLAS) at a distance of 675 million ...