"Wow!" That was the exclamation written by astronomer Jerry Ehman after receiving a truly unique radio signal from deep space on August 15, 1977.

The Wow! signal was a strong narrowband radio signal detected on August 15, 1977, by Ohio State University 's Big Ear radio telescope in the United States, then used to support the search for …

Aug 23, 2024 · Perhaps unsurprisingly, many people began to suggest that the so-called “Wow! signal” was a message from extraterrestrials. But now, three astronomers have proposed a new cause …

Nov 21, 2025 · After almost half a century of wondering, astronomers may have found the cause of the mysterious Wow! Signal. And no, it’s not aliens. The signal was first spotted as part of a 22-year …

What have we learned about that signal over this time? Could it have come from an intelligent civilization beyond our solar system, or could it have been just an emission generated by some activity of our …

Signal was first observed on August 15, 1977 by the Ohio State University's Big Ear radio telescope near the 21-cm hydrogen line at 1420 MHz, and has not been redetected since. The Breakthrough …

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Was it really a ping from an extraterrestrial society, a natural signal source, or simply terrestrial interference? The answer is still unknown, largely because the signal has not been seen a second time.

Aug 26, 2025 · That means the signal was likely astronomical in origin, though the most likely explanation still isn't extraterrestrials. The most likely culprit is a HI cloud - clouds of neutral atomic …

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