On this day in space! Aug. 15, 1977: Mysterious ‘Wow!’ Signal boosts search for E.T.

August 15, 2026

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On Aug. 15, 1977, astronomers using Ohio State University’s Big Ear radio telescope detected the famous “Wow!” signal, which remains unexplained to this day.

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Aug. 15, 1977: The Wow! Signal arrives

APOD: 2026 August 15 – Bright Perseids from Sweden