Скачать или смотреть SIGNAL UNKNOWN: The Universe's Most Mysterious Transmissions

A legendary blip shook the world of radio astronomy on August 15, 1977. In this fast-paced deep dive, we decode the Wow! Signal, a 72-second narrowband transmission detected by the Big Ear radio telescope in Ohio at the hydrogen line frequency of 1420 megahertz. It was roughly thirty times stronger than the background noise, drifted just as a distant source should while Earth rotated, and seemed to come from the direction of Sagittarius near Chi Sagittarii. It never returned. We break down what made it extraordinary, why it is still unexplained, and what the leading theories say about the most famous unsolved radio signal in SETI history.

This video is your high-energy guide to the facts behind the Wow! Signal. We cover how Dr. Jerry Ehman circled the printout and wrote “Wow!,” why the hydrogen line matters for SETI, what narrowband signals reveal about artificial versus natural sources, and why decades of follow-ups after Big Ear’s demolition in 1997 have found nothing. We test ideas from extraterrestrial intelligence to interstellar scintillation, human interference, and the 2017 comet proposal by Antonio Paris, and we show why none have closed the case. If you care about space signals, SETI, radio astronomy, and the hunt for evidence, this is the must-watch breakdown.

Key Points Covered:
The Wow! Signal was detected on August 15, 1977, at 1420 megahertz on the hydrogen line by the Big Ear radio telescope in Ohio.
Dr. Jerry Ehman discovered the signal in printouts and wrote “Wow!” in the margin, giving the event its name.
The signal lasted 72 seconds, was roughly thirty times the background noise, and was narrowband with slight frequency drift consistent with a distant source.
The apparent sky location was toward Sagittarius near Chi Sagittarii, but the signal never repeated despite extensive follow-up.
Leading explanations include extraterrestrial intelligence, interstellar scintillation, Earth-based interference, and a 2017 comet hypothesis that failed to match the frequency and concentration.
The Big Ear telescope was demolished in 1997, and modern searches have not re-detected the signal, leaving the event unexplained.
The Wow! Signal remains the gold standard example of an unsolved SETI candidate and a benchmark for how to separate signal from noise in radio astronomy.

Chapters:
00:00 - The Wow! Signal Hook.
00:20 - Why The Hydrogen Line Matters.
01:05 - The 72 Second Printout And “Wow!”.
01:50 - Narrowband Power And Frequency Drift.
02:30 - Sky Position Toward Sagittarius.
03:00 - Theories From Aliens To Comets.
03:40 - Why It Never Repeated.
04:10 - What The Mystery Teaches Us.

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Three Big Questions Answered:
What is the Wow! Signal, and why did Dr. Jerry Ehman write “Wow!” on the printout?
Why is the hydrogen line at 1420 megahertz important for SETI and artificial radio signals?
What are the leading theories that try to explain the Wow! Signal and why has none been confirmed?

If you are searching for the Wow! Signal explained, SETI signals, hydrogen line frequency, Big Ear Ohio, Jerry Ehman, narrowband radio signals, alien radio signal theories, unexplained space signals, and cosmic mysteries, you are in the right place. This video focuses on facts from the historical record and the scientific discussion presented in the transcript, keeping the story tight, engaging, and accurate. Share your favorite theory in the comments and tell us what new evidence would finally tip the scales for you.

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