The Mysterious Signals Scientists Still Can_t Explain in Deep Space
The Wow! Signal was a powerful 72-second radio burst detected in 1977, so remarkable that astronomer Jerry Ehman circled the data and wrote "Wow!" next to it. It was 30 times louder than background noise and occurred at the 1420 MHz hydrogen line, a frequency some scientists believe could be used for interstellar communication [citation:1][citation:4]. The signal has never been detected again, despite decades of searching [citation:1]. Some researchers now suggest it may have been caused by a natural astrophysical process, such as a magnetar interacting with a hydrogen cloud, but its exact…
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