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

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

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

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

One thing about 3I/ATLAS is for certain: It's definitely not from Earth's solar system. But what exactly is the intriguing interstellar object discovered speeding through our cosmic neighborhood? Most ...

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 ...

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

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

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

A telescope in Chile recently glimpsed 3I/ATLAS' glowing tail, which observations reveal has grown as the interstellar object ...