The Wow! Signal
The Wow! Signal refers to a strong, narrowband radio signal detected by astronomer Jerry R. Ehman on August 15, 1977, while working on a SETI project at Ohio State University. Lasting for 72 seconds, the signal stood out due to its intensity and unusual characteristics, leading Ehman to write "Wow!" on the printout. Despite extensive follow-up searches, the source has never been identified, making it one of the most intriguing mysteries in the search for extraterrestrial intelligence.
The Wow! Signal
The Wow! Signal refers to a strong, narrowband radio signal detected by astronomer Jerry R. Ehman on August 15, 1977, while working on a SETI project at Ohio State University. Lasting for 72 seconds, the signal stood out due to its intensity and unusual characteristics, leading Ehman to write "Wow!" on the printout. Despite extensive follow-up searches, the source has never been identified, making it one of the most intriguing mysteries in the search for extraterrestrial intelligence.
💡 Key Takeaways
- Identify the Wow! Signal as a strong, narrowband radio signal detected on August 15, 1977 by Jerry R. Ehman at Ohio State University's Big Ear telescope.
- Understand why its narrow bandwidth and high intensity made it notable as a possible extraterrestrial communication candidate.
- Note that the signal lasted 72 seconds and has not been repeated in subsequent observations, leaving its origin unresolved.
- Appreciate how the event influenced SETI research—shaping data analysis, verification practices, and ongoing searches for repeatable, verifiable signals.
❓ Frequently Asked Questions
What is the Wow! Signal?
A strong, narrowband radio signal detected on August 15, 1977 by Jerry R. Ehman during a SETI survey at the Big Ear telescope (Ohio State University). It stood out for its intensity and unusual single-sweep signature, prompting Ehman to write 'Wow!' on the printout.
How long did the Wow! Signal last and why is it noteworthy?
It lasted about 72 seconds as the telescope’s beam crossed the source. Its narrowband nature and strength made it a highly intriguing candidate for an artificial origin, though no definitive source was identified.
What frequency was the Wow! Signal detected near?
It appeared near the hydrogen line, around 1420 MHz, a frequency frequently discussed in SETI because it’s a strong, narrow radio line that could be targeted by intelligent civilizations.
Was the Wow! Signal ever confirmed or explained?
No follow-up observations confirmed it, and its origin remains unknown. It is an unresolved anomaly that still sparks discussion about extraterrestrial intelligence.