In comparison, the first known interstellar visitor, 1I/'Oumuamua, had an eccentricity of about 1.2, and 2I/Borisov came in at 3.6. 3I/ATLAS massively outpaces both.

A rare but faint interstellar visitor from beyond our solar system is racing toward the sun — and you can watch it live online today! Astronomers have identified this cosmic interloper as 3I ...

The new interstellar comet's official name is 3I/ATLAS. It's officially the third known interstellar object to pass through our solar system, and it poses no threat to Earth.

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar system by more than 3 billion years, researchers say.

For only the third time, astronomers have found something passing through our solar system that came from outside the solar system. This interstellar object, known as 3I/ATLAS, is still pretty far ...

NASA has named this latest interstellar object 3I/ATLAS, after detecting it this week with the NASA-funded ATLAS (Asteroid Terrestrial-impact Last Alert System) survey telescope in Rio Hurtado, Chile.