Project Ozma

Project UAP Ozma was a search for extraterrestrial intelligence (SETI) experiment started in 1960 by Cornell University astronomer Frank Drake, at the National Radio Astronomy Observatory, Green Bank at Green Bank, West Virginia.

The object of the experiment was to search for signs of life in distant planetary systems through interstellar radio waves.

[2] Drake used a radio telescope with a diameter of 85 feet (26 m) to examine the stars Tau Ceti and Epsilon Eridani near the 1,420 MHz marker frequency, the equivalent of wavelength of 21 centimeters which corresponds to the energy of a photon emitted from a hydrogen atom during "spin-flip" transition.

A 400 kilohertz band was scanned around the marker frequency, using a single-channel receiver with a bandwidth of 100 hertz.

[5] A second experiment, called Ozma II, was conducted with a larger (300 feet (91 m)) telescope at the same observatory by Patrick Palmer and Benjamin Zuckerman, who intermittently monitored 670 nearby stars for about four years (1972–76).