![]() ![]() Secondly, if they are using radio waves to communicate with us, they would likely use a frequency that other intelligent aliens would be naturally tuned into. This is no coincidence through alien-hunting logic, should there be an extraterrestrial species wanting to make contact, what frequency would they use? Firstly, as we only have ourselves to use as an alien template, we have to assume that hypothetical aliens will likely use radio waves. It just so happens that cosmic neutral hydrogen naturally radiates at this frequency - it is therefore an abundant signal that is commonly used in astronomy. The "Wow!" signal was recorded in the 1420MHz radio frequency band. Interestingly, these comets, called 266P/Christensen and 335P/Gibbs, were only discovered in 20, so weren't considered as possible reasons for the signal in 1977 as no one knew of their existence.īut what have comets got to do with errant radio bursts? In an interview with, Paris says that his investigative background sent him on a mission to find another possible explanation for the "Wow!" signal and he tracked down two "suspicious" comets that may have been in the vicinity of Chi Sagittarii on Aug. Now, Antonio Paris of St Petersburg College, Fla., an ex-analyst of the US Department of Defense, hopes to solve the mystery and he suspects that an entirely different cosmic phenomenon is to blame. Even after the SETI Institute was founded in 1984, and countless efforts have been made to find another radio burst like the "Wow!" signal, astronomers have been faced with silence in the cosmos a problem that has only served to intensify the Fermi Paradox unease. However, since that day in 1977, a detection of a signal of that strength has not been replicated. The wave profile of the "Wow!" signal is graphically envisaged here. As the burst suggests, the signal strength hit "6" and then blasted through the letters reaching a peak of "U" before subsiding back into the numerical scale at "5." There was then a slight wave trailing the main signal (hence the circled "6″ and "7"). This particular code first uses the numbers 1-9 and then the alphabet A-Z to denote signal strength. The Big Ear printout contains a bunch of apparently random numbers and letters, but Ehman’s red pen circles a cluster of digits "6EQUJ5" with other circles around a "6" and "7" on separate columns. This excitement wasn't an overstatement, it was this kind of signal he was looking for, the kind of signal astronomers thought a technologically-capable alien civilization would produce. ![]()
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