An object that was born around another star, drifted through interstellar space for longer than the Sun has existed, and briefly passed through the inner solar system is now on its way back out into ...

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

Long before 3I/ATLAS slipped through the inner solar system, its water had already recorded the kind of place it came from. That record now looks extreme. Astronomers studying the interstellar comet ...

Add Yahoo as a preferred source to see more of our stories on Google. Strange isotope signals in 3I/ATLAS suggest the interstellar comet formed around an ancient, metal-poor star. (CREDIT: Wikimedia / ...

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Add Yahoo as a preferred source to see more of our stories on Google. Remember 3I/ATLAS? Yes, the interstellar comet that made plenty of headlines in 2025 is still romping through our solar system.

An image of interstellar comet 3I/ATLAS captured by a telescope in Hawaii International Gemini Observatory / NOIRLab / NSF / AURA / B. Bolin Image Processing: J. Miller & M. Rodriguez (International ...

Less than a year ago, astronomers discovered a comet soaring through our sky that was not from our solar system. Although we still don’t know where this interstellar object called 3I/ATLAS came from, ...

For millions of years, a frozen wanderer drifted between the stars before slipping into our solar system as 3I/ATLAS—only the third known interstellar comet ever spotted. When scientists turned NASA’s ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. NASA shared some new infrared images of the 3I/ATLAS interstellar comet ...

Comet 3I/ATLAS is an interstellar traveler, visiting our solar system from another part of the galaxy. While its place of origin remains a mystery, astronomers believe it was formed under conditions ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...