Just How Many Alien Civilizations Could Be Out There?
As our advancing technology allows us to look deeper and deeper into space, and to do so with ever better resolution and detail, we continue to find other solar systems that contain planets. Scientists believe the planets we’ve found so far are a tiny percentage of how many are actually out there, so the optimistic amongst us believe that there simply must be alien life out there somewhere. But if there is, how many other civilizations might there be?
A very cool new interactive infographic has been posted by the BBC, which allows us to calculate several different estimates of how many alien civilizations might exist, both within our galaxy and within the universe. It begins with the Drake Equation, created in 1961 by astronomer Frank Drake to estimate how many “detectable civilizations” could exist in our galaxy. The Drake Equation’s estimates are the first option to use on the infographic, which walks you through each step of the math before arriving at a total: an estimated 18,750,00 communicating civilizations (broadcasting signals that we could theoretically detect) within the Milky Way, and a staggering 2,812,500,000 bn within the entire universe.

