Caelum Incognitum — The interactive encyclopedia of ufology
Project Ozma
Astronomy, exobiology & SETI
The first modern search for extraterrestrial signals: in 1960 Frank Drake pointed the Green Bank radio telescope for about 150 hours at Tau Ceti and Epsilon Eridani, around 1,420 MHz (the hydrogen line). Nothing artificial was detected, but the experiment launched SETI.