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

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

Astronomers are tracking a newly spotted comet hailing from parts unknown, only the third time such an interstellar object ...

The space agency spotted the quick-moving object with the Atlas telescope in Chile earlier this week, and confirmed it was a comet from another star system. It’s officially the third known ...

Thanks to ALMA’s powerful precision, scientists have now confirmed that comet C/2014 UN271 holds the title of the largest ...

A team of astronomers has made a groundbreaking discovery by detecting molecular activity in comet C/2014 UN271 ...

A newly discovered comet, called C/2025 F2 (SWAN), may have disintegrated. But the remnants are still visible.

Researchers got an up-close look at the largest comet ever observed, C/2014 UN271, hurtling toward the sun from the Oort Cloud and measuring 85 miles across with jets of carbon monoxide gas.

It’s thought the comet was last seen from Earth by Neanderthals more than 80,000 years ago, and stargazers have already spotted it in the southern hemisphere this time around.

Comet SWAN, hailing from the Oort Cloud beyond Pluto, may not have survived its recent trip past the sun and is fading fast. April 21, 2025, 11:52 AM EDT / Source: The Associated Press.