The Big Ear
Hydrogen's unique electromagnetic emissions point astronomers to a specific frequency range known as the "watering hole," ideal for detecting extraterrestrial signals. The Big Ear, a massive radio telescope at Ohio State University, played a pivotal role in surveying the skies from 1963 to 1971, uncovering nearly 20,000 radio sources. After its initial survey, it was repurposed for the search for extraterrestrial intelligence, culminating in a significant event on August 15, 1977.In this clip
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