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Deep space transmissions decoded and interpreted
Notable transmissions from across the electromagnetic spectrum.
Each entry represents a mystery waiting to be understood.
Dr. Jerry Ehman circled the printout and wrote "Wow!" — the strongest candidate for an extraterrestrial radio signal ever detected. It matched all expected criteria for an ET signal and has never been satisfactorily explained.
Initially dubbed "LGM" (Little Green Men) by Jocelyn Bell Burnell who discovered the perfectly regular pulses. Later identified as the first known pulsar — a rotating neutron star — but for a few exciting weeks, it seemed alien.
The first known repeating fast radio burst. These millisecond blasts release as much energy as the sun does in 80 years. Their origin remains one of astronomy's great mysteries.
Breakthrough Listen Candidate 1 — a narrow-band signal appearing to come from our nearest stellar neighbor. Analysis suggests terrestrial interference, but the tantalizing possibility lingers.
A SETI@home candidate that appeared three times at the hydrogen line frequency. Its drift rate suggests a planet rotating 40 times faster than Earth — or something else entirely.