Water on Interstellar Comet 3I/ATLAS: In one of the most exciting astronomical discoveries of the decade, NASA’s Neil Gehrels Swift Observatory has confirmed traces of water on the interstellar comet 3I/ATLAS, marking a groundbreaking moment for planetary science. The faint ultraviolet signal, caused by hydroxyl gas, a byproduct of water molecules breaking apart under sunlight, was detected as the comet passed through our Solar System.

According to Dr Zexi Xing, lead researcher from Auburn University, “Every interstellar comet so far has been a surprise,” and 3I/ATLAS is proving no exception.

A Visitor Older Than Earth Itself

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First discovered in July 2025 by Hawaii’s ATLAS telescope, 3I/ATLAS is only the third known interstellar object to ever pass t

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