Drake equation
The Drake equation is a probabilistic formula devised in 1961 by American astronomer Frank Drake to estimate the number of communicative extraterrestrial civilizations in the Milky Way. First presented at a meeting on the search for extraterrestrial intelligence (SETI) at the Green Bank Observatory, it organizes astronomical, biological, and technological factors into a single framework. The equation has guided SETI research and provoked debate about its uncertainties and interpretation.
