The ‘Wow!’ Signal
On August 15th, 1977, an incredibly strong narrowband radio signal was received by Ohio State University’s Big Ear radio telescope, which was being used to search for extraterrestrial intelligence. The entire signal sequence lasted for the full 72-second window during which Big Ear was able to observe it, but has not been detected since.
It wasn’t noticed until a few days later when astronomer Jerry R. Ehman was going over the data of the telescope and noticed it. Shocked by the results of the signal, he circled the data and wrote a big ‘Wow!’ next to it, which gave the signal its name.