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February 10, 2021 10:05 pm

There's a Tantalizing Sign of a Habitable-Zone Planet in Alpha Centauri

An international team of astronomers has found signs that a habitable planet may be lurking in Alpha Centauri, a binary star system a mere 4.37 light-years away. It could be one of the closest habitable planet prospects to date, although it's probably not much like Earth if it exists. From a report: The new findings: The Alpha Centauri system's potential to host life-bearing worlds has always intrigued scientists, but no known exoplanets have ever been established there -- in part because the close proximity meant it was too bright for astronomers to really narrow in on any planetary objects in the area. But in a paper published in Nature Communications on Wednesday, an international team of astronomers using the European Southern Observatory's Very Large Telescope (VLT) in Chile found a bright thermal imaging signal coming from the habitable zone of Alpha Centauri A. The signal was derived through Near Earths in the Alpha Center Region (NEAR), a $3 million project supported by the ESO and Breakthrough Watch. The latter is an initiative backed by Russian billionaire Yuri Milner to look for Earth-size rocky planets around Alpha Centauri and other star systems within 20 light-years of us. NEAR was able to push forward upgrades to the VLT that included a thermal chronograph, which can block stellar light and look for heat signatures coming from planetary objects as they reflect the light from their star. It found the signal around Alpha Centauri A after analyzing 100 hours of data.

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