(International Gemini Observatory/NOIRLab/NSF/AURA/Shadow the Scientist; Image Processing: J. Miller & M. Rodriguez ...

Comet 3I/ATLAS arrived from beyond the Solar System carrying a chemical story unlike anything astronomers had measured before. In the gas around it, they found isotope ratios that do not match the ...

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

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

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

Astronomers surveying the outer solar system have revealed that a rare object far beyond Neptune is moving in sync with the eighth planet in an unexpected way. Called 2020 VN40 and first discovered in ...

One year ago, on July 1 2025, astronomers discovered a fascinating new object moving through the Solar System. Detected by the Asteroid Terrestrial-impact Last Alert System (ATLAS), the object was ...

When 'Oumuamua traversed our solar system in 2017 it was the first confirmed Interstellar Object (ISO) to do so. Then in 2019, Comet 2l/Borisov did the same thing. These are the only two confirmed ...

This cosmic visitor is now officially named 3I/ATLAS, and it appears to be a comet from another solar system. Reading time 3 minutes Update: July 3, 09:24 a.m. ET: On Wednesday, July 2, the ...

As the United States prepares to celebrate its 250th anniversary, the history of the solar system tells its own story of ...

Carnegie’s Scott Sheppard and his colleagues — Northern Arizona University’s Chad Trujillo, and the University of Hawaii’s David Tholen — are once again redefining our solar system’s edge. They ...