New interstellar object 3I/ATLAS — Everything we know about the rare cosmic visitor

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Astronomers have confirmed a rare and extraordinary discovery: the third known interstellar object to enter our solar system.

Named 3I/ATLAS, where 3I stands for “third interstellar”, and designated C/2025 N1 (ATLAS), the object was first spotted on July 1, 2025, by the Deep Random Survey remote telescope in Chile, part of the ATLAS (Asteroid Terrestrial-impact Last Alert System) project.



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