Less than a year ago, astronomers discovered a comet soaring through our sky that was not from our solar system. Although we ...

Learn more about the interstellar traveler, Comet 3I/ATLAS, and what researchers know about its place of origin.

3I/ATLAS is now sailing away from Earth and our solar system itself, but astronomers have already learned a wealth of ...

The interplanetary comet 3I/ATLAS is remarkably rich in a specific type of water that contains deuterium, meaning it came ...

A comet born around another star is carrying water unlike anything ever measured in our solar system. Observations of comet ...

Scientists trace 11 billion year old comet’s home to a mystery cold corner of the Milky Way - This celestial wanderer is only ...

Discover Comet 3I/Atlas, one of only three confirmed interstellar visitors and possibly 11 billion years old, with clues from heavy hydrogen suggesting an origin in a cold, isolated region of the Milk ...

The first reports of comet 3I/ATLAS were made on July 1, 2025, by the ATLAS (Asteroid Terrestrial-impact Last Alert System) telescope in Chile. This comet caught the world's attention since it was the ...