A team of astronomers have presented the first polarimetric observations of interstellar comet 3I/ATLAS, finding that it has extreme negative polarization. On July 1, 2025, astronomers spotted an ...

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Need a refresher about 3I/ATLAS? Here's everything to know about the interstellar object, including when the latest observations will be made.

H. Christopher Frey does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...