Astronomers have revealed new details about the makeup and age of a visiting comet that was born around a distant star. They ...

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

Astronomers have used the European Southern Observatory's Very Large Telescope (ESO's VLT) to study the composition of ...

Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion years old—about three times the age of the solar system ...

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

Every few years, something slips through our cosmic neighborhood that doesn't belong here. It arrives from somewhere out past ...

A team combined compositional data of primitive bodies like Kuiper Belt objects, asteroids and comets with new solar data sets to develop a revised solar composition that potentially reconciles ...

The findings surprised researchers, who used the comet's composition to better understand the environment in which it formed.

In the latest research, telescope observations of 3I/ATLAS examine its chemical structure and suggest that it took shape in a ...