The “Wow” Signal

It’s no rare occurrence in science fiction: The introverted researcher working the graveyard shift at a SETI radio observatory jumps out of his seat in surprise when the red light blinks on the control panel. “We’re getting a signal!” he shouts into a phone as needles dance across paper chart recorders, and scientists rapidly converge on the scene. At some point someone yells, “Get me the President!” at the person whose job it is to get presidents. On August 15th, 1977, such a signal was received at the Big Ear radio observatory in Ohio, though the ensuing drama was considerably more subdued. The volunteer who spotted the pattern on the paper logs circled the data and wrote “Wow!” in the margin. The radio telescope was observing space as part of the Search for Extra-Terrestrial Intelligence (SETI) program, and it was the most compelling signal the receiver had recorded in its fourteen years of operation. It was powerful enough to push the Big Ear’s monitoring device off the charts.