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What is the Wow! signal? A) A UV signal, recorded by the International Ultraviolet Explorer in 1975 B) A strong narrow-band radio signal, detected by the Big Ear radio telescope in 1977 C) A ultraviolet light beam, captured by the Hubble Space Telescope in 2009 D) An X-ray event, detected by the Chandra Telescope in 2011 E) An optical light flash, observed by the Mc Donald Observatory, West Texas, in 2012

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