Project Ozma and Ozma II: Pioneering Radio Searches for Extraterrestrial Intelligence

To the point

Frank D. Drake directed Project Ozma, an early SETI radio search that used a 21-centimeter receiver on a Green Bank telescope to listen for intelligent signals from nearby stars like Epsilon Eridani and Tau Ceti, later followed by Ozma II led by Benjamin Zuckerman and Patrick Palmer that surveyed hundreds of nearby stars, but no convincing signals were found and these efforts laid the groundwork for future radio-astronomy work in the search for extraterrestrial life.