The Search for Alien Radio Signals From K2-18b, One of the Most Closely Watched Possible Ocean Worlds, Came up Empty After Two of the Most Powerful Arrays on Earth Scanned It for a Full Orbit
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The search for alien radio signals from K2-18b, one of the most closely watched possible ocean worlds, came up empty after two of the most powerful arrays on Earth scanned it for a full orbit
Two of the most powerful radio observatories on Earth took turns aiming at a single faint star 124 light-years away, listening for any sign that a technological civilization might be broadcasting from the planet that circles it. That planet is K2-18b, the sub-Neptune that has become the most talked-about candidate for a habitable world beyond the Solar System. Across a full orbit, over months in late 2023, the answer that came back on six radio …
A team of astronomers pointed two of the world's most powerful radio telescopes at K2-18b, a planet 124 light years from Earth, and found no artificial radio signal.The tracking, one of the most sensitive so far, examined millions of possible detections in the exoplanet system.K2-18b became one of the most observed worlds of the last decade because it orbits in the habitable zone of a red dwarf star, in Leo's constellation.It has about 8.6 times…
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