For only the third time in history, astronomers have identified what they think is an interstellar object — and it could be ...

Comet 3I/ATLAS was discovered on July 1. “It came from outside our solar system and right now, it's inside the orbit of ...

The comet should remain viewable through telescopes until September as it approaches the Sun, then emerge again in December on its outbound leg.

Astronomers on Wednesday confirmed the discovery of an interstellar object racing through our Solar System -- only the third ...

These things take millions of years to go from one stellar neighborhood to another, so this thing has likely been traveling ...

The space agency spotted the quick-moving object with the Atlas telescope in Chile earlier this week, and confirmed it was a ...

A comet has entered the Solar System from interstellar space and will pass through the inner planets later this year, NASA ...

NASA said the comet will make its closest approach to the sun in late October, scooting between the orbits of Mars and Earth -- but closer to the red planet than us at a safe 150 million miles (240 ...

NASA has discovered a new interstellar comet that's currently located about 420 million miles away from Earth. The space ...

By Will Dunham WASHINGTON (Reuters) -Astronomers are tracking a newly spotted comet hailing from parts unknown, only the ...