«Years ago Frank Drake wrote down an equation for the number of intelligent civilizations in the galaxy,» Rieke says. (discovermagazine.com)
The Drake equation, developed by astronomer Frank Drake and promoted by Carl Sagan, is used to estimate the number of intelligent civilizations in the universe. (science.howstuffworks.com)
On February 19, 2006, Turnbull named HR 483 A as a Sun - like star that is old enough to qualify as a top - five candidate for those listening for radio signals from intelligent civilizations, such as the SETI Institute. (solstation.com)