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The First Radio Signal From Comet 3I/Atlas Ends Debate on Its Nature

MeerKAT recorded OH absorption lines at 1665 MHz and 1667 MHz from comet 3I/ATLAS near perihelion, marking the first radio detection of this interstellar object.

Summary by Wired
An observatory detected the first radio signal from the interstellar object 3I/Atlas. Here's what it means.

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Comet 3I/ATLAS was again visible after a long period of invisibility caused by its position vis-à-vis the Sun. That is why its reappearance marked the beginning of an unprecedented scientific campaign against the clock to study the object of interstellar origin.That this celestial body is again visible not only arouses fascination among astronomers, but also raises new questions about how comets are formed and evolved in other regions of the gal…

·Buenos Aires, Argentina
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la Nacion broke the news in Buenos Aires, Argentina on Sunday, November 9, 2025.
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