Interstellar comet 3I/ATLAS was almost called 3I/Rubin, after researchers found that the giant survey telescope ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have ...

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically different from anything known to have ever formed around our sun ...

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place before our solar system existed.

We already knew interstellar comet 3I/ATLAS came from somewhere far beyond our solar system. Now scientists have more ...

A rare comet from another star system is revealing just how different alien solar systems may be from our own.

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. A deep image of interstellar Comet 3I/ATLAS captured by the ...

The Southwest Research Institute-led Ultraviolet Spectrograph (UVS) instruments aboard ESA's Jupiter Icy Moons Explorer ...

Comet 3I/ATLAS was imaged and studied simultaneously by the Juice and Europa Clipper spacecraft as it flew past the Sun ...

The interstellar comet 3I/ATLAS changed significantly as it flew by the sun last fall, astronomers have discovered.

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