Cosmic Mystery: The Enigma of the Wow! Signal
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The Wow! Signal was a strong radio signal detected in 1977, originating from the direction of the Sagittarius constellation. It lasted 72 seconds and remains unexplained, sparking interest in the search for extraterrestrial intelligence (SETI).
1. Discovery:
The Wow! Signal was detected on August 15, 1977, by astronomer Jerry R. Ehman during a SETI (Search for Extraterrestrial Intelligence) project at the Big Ear radio telescope.
2. Intensity:
It was a strong, narrowband signal, 30 times stronger than the background noise. The signal's strength fueled speculation about its potential extraterrestrial origin.
3. Duration:
The signal lasted for 72 seconds, matching the length of the Big Ear's beam scan over the sky.
4. Frequency:
The signal was observed at the frequency of 1420 MHz, which is a significant frequency for radio astronomy as it corresponds to the natural emission of hydrogen, the most abundant element in the universe.
5. Origin:
Despite subsequent efforts to detect a repeat of the signal or identify its source, the Wow! Signal remains a one-time event with an unknown origin. It has not been successfully replicated or explained.
6. Ehman's Reaction:
Discovering the signal on a printout, Jerry Ehman circled the data and wrote "Wow!" next to it, giving the signal its name.
7. Search for Repeats:
Many attempts to find a repeat of the Wow! Signal have been made over the years, but none have been successful. The mystery surrounding its origin persists.
8. Natural or Artificial:
While the possibility of the signal being of extraterrestrial origin has been considered, natural phenomena or human-made interference haven't been ruled out as potential explanations.
9. Scientific Interest:
The Wow! Signal generated increased interest and funding for SETI projects, contributing to ongoing efforts to detect signals from intelligent extraterrestrial civilizations.