Astronomers pointed two of the world’s most sensitive radio telescopes at 3I/ATLAS, the third confirmed interstellar object ...

Comet 3I/ATLAS arrived from beyond the Solar System carrying a chemical story unlike anything astronomers had measured before ...

During last year’s brief visit from the comet 3I/ATLAS, astronomers got an extremely rare glimpse into the cosmos beyond our ...

China’s Tianwen-1 orbiter caught a rare glimpse of 3I/ATLAS as it swept past Mars, revealing the hazy coma and tail of a ...

The SETI Institute is the latest to confirm what scientists have long suspected: the interstellar 3I/ATLAS comet is not an alien spaceship.

Cropped image of NASA’s James Webb Space Telescope observation of comet 3I/ATLAS with its Near-Infrared Spectrograph ...

A deep image of interstellar Comet 3I/ATLAS captured by the Gemini Multi-Object Spectrograph (GMOS) on Gemini South at Cerro Pachón in Chile, one half of the International Gemini Observatory and ...

The water and carbon in 3I/ATLAS reveal an extremely cold and ancient origin, possibly in a planetary system that formed ...

A comet from another star system does not arrive every year. That is part of what made 3I/ATLAS so compelling when it appeared in July 2025.

The most sensational story of the year for astronomers has been the discovery of the comet 3I/ATLAS, which was first observed on July 1, 2025 by NASA's Asteroid Terrestrial-impact Last Alert System ...

Astronomers first spotted Comet 3I/ATLAS in June 2025, and it was later confirmed as an interstellar visitor that originated from outside our solar system. As the comet’s name indicates, it is the ...