During September's total lunar eclipse, astronomers captured rare images of interstellar comet 3I/ATLAS glowing green, ...

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

The eyes of every astronomer widened this year when an interstellar traveler was discovered in our solar system.

Normally, comets get that green coloration from dicarbon, a rare molecule formed when sunlight breaks down carbon-based gases. But early telescope readings haven’t yet found it in 3I/ATLAS. Some ...

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

Gemini South caught Comet 3I/ATLAS “switching on,” as students and astronomers joined to see dust, gas, chemistry from ...

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

Since its discovery, astronomers have been frantically trying to gather as much information as they can about the newest interstellar interloper dubbed 3I/ATLAS. It's been challenging, but they've ...

This quiz invites you to chase comets through time and space, from ancient omens to modern scientific marvels.

Nasa scientists dismiss claims about Comet 3I/Atlas. A Harvard astronomer had suggested it might be alien tech. The comet was ...

New photos captured during the recent "blood moon" total lunar eclipse show that the interstellar comet 3I/ATLAS may be ...

Halley’s Comet is the most famous periodic comet, returning to the inner solar system roughly every 76 years and captivating ...