Scientists studying 3I/ATLAS have spotted unusually slow gas around the interstellar comet, offering fresh clues about its ...

An interstellar visitor that has been under close watch since it entered the solar system is showing scientists something new about what it is made of. Astronomers using the Subaru Telescope in Hawaii ...

More than tenfold: That is the reported deuterium difference between water in interstellar comet 3I/ATLAS and water measured ...

Interstellar comet contains an unusually high amount of methanol, and new data indicate that it was born in a very cold and ...

The Subaru Telescope observed the interstellar comet 3I/ATLAS on January 7, 2026, after it made its closest approach to the sun. By observing colors in the coma around the comet, astronomers could ...

WASHINGTON—Scientists studying the comet 3I/ATLAS have determined that this interstellar visitor is remarkably ancient—formed an estimated 10 to 12 billion years ago in a primordial planetary ...

The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) aboard NASA's Europa Clipper spacecraft has made valuable observations of the interstellar comet 3I/ATLAS, which in July became the ...

An assessment published this week on the isotopic composition of interstellar comet 3I/ATLAS suggests an intriguing possibility: The comet may be between 10 and 12 billion years old, making it roughly ...

Space has a way of reminding us how little we actually know about the neighbourhood beyond our own front door. When a new visitor streaks through our solar system, scientists scramble to catch a ...

Astronomers have revealed new details about the make-up and age of a visiting comet that was born around a distant star. They conclude that the composition of 3I/Atlas is strikingly different from any ...

Interstellar comet 3I/ATLAS (C/2025 N1) captured by the Subaru Telescope on December 13, 2025 (Hawaii-Aleutian Standard Time). This image was created by combining three different wavelengths: V-band ...

Add Yahoo as a preferred source to see more of our stories on Google. The Hubble Space Telescope image of the interstellar comet 3I/ATLAS on July 21, 2025, when the comet was 277 million miles from ...