Comet 3I/ATLAS has already puzzled astronomers with its odd trajectory, twin tails and sudden bursts of activity. Now a rhythmic 16.16-hour “heartbeat” has become the latest mystery. Most researchers see a rotating, venting comet. Harvard astrophysicist Avi Loeb argues the pulse points instead to jets driving the brightness “like a bloodstream”, keeping open, cautiously, the possibility of something more engineered.from US News Headlines, Latest USA News, US news live on Times of India https://ift.tt/vmK6jU1
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