What is the true nature of the 1977 Wow! Signal?
- 演化之聲
- Mar 20
- 3 min read
On August 15, 1977, the Big Ear radio telescope at Ohio State University detected a mysterious signal that has never been reproduced. Known as the Wow! Signal, it stood out because of three striking properties: a strong narrowband emission, a frequency near 1420 MHz corresponding to the 21 cm hydrogen line, and a duration of 72 seconds. These features made it a compelling candidate for a possible extraterrestrial transmission. Yet, despite decades of follow-up observations, no identical signal has ever been detected again, leaving it as one of the most enduring enigmas in the history of the search for extraterrestrial intelligence (SETI).
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