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A hunt for signs of alien technology on the rare interstellar visitor 3I\/ATLAS has come up empty, according to researchers from the Breakthrough Listen initiative.<\/strong><\/p>\n In a campaign to detect \u201ctechnosignatures\u201d\u2014radio signals that would indicate intelligent life\u2014the team reported no credible transmissions coming from the comet, even down to the faint 100-milliwatt level.<\/p>\n 3I\/ATLAS is significant because it is a rare visitor from outside our solar system, offering a limited window for scientific scrutiny. First detected in July 2025 by the NASA-funded ATLAS survey in Chile, the object passed Earth at a safe distance of approximately 270 million km (170 million miles).<\/p>\n Speculation about the object\u2019s nature spiked after Harvard astrophysicist Avi Loeb highlighted unusual features in Hubble images. In a Medium post, Loeb questioned whether the comet\u2019s long, sunward \u201canti-tail\u201d and three-pronged inner jet pattern suggested an artificial origin rather than typical cometary activity.<\/p>\n To test these theories, the Green Bank Telescope observed the object for five hours on December 18. Observers used an \u201con-off\u201d switching method to filter out interference from Earth-based satellites and aircraft.<\/p>\n Technosignatures typically appear as narrowband radio signals, distinct spikes in frequency rarely found in nature. However, the scan revealed nothing.<\/p>\n The episode mirrors the frenzy surrounding \u02bbOumuamua in 2017 and 2I\/Borisov in 2019. Despite the speculation, NASA officials maintain that the object is natural.<\/p>\n \u201cThis object is a comet,\u201d NASA associate administrator Amit Kshatriya stated during a November briefing, citing its trajectory and behavior.<\/p>\n While the Green Bank observations provide a strong snapshot, they are not an exhaustive audit. Researchers note that stronger signals can sometimes mask weaker ones, and image processing variations can alter how cometary jets appear. For now, however, 3I\/ATLAS appears to be just another silent traveler through our system.<\/p>\n<\/div>\n