In the 1960′s, U.S. astronomer Frank Drake started the first real search for alien radio signals being beamed across the Universe. Off the back of this work, he came up with an equation that is at best, an educated stab at the number of civilizations in our Galaxy with which we might actually be able to communicate right now. [...]
So this is the exciting bit, plug those numbers all in to the equation and you come up with… (drum roll please) …50!
Is that really it?
The number of contactable civilizations in our Galaxy, right now, that we might communicate with, is just 50… fifty? It’s estimated that there is around 400 billion stars in our Galaxy and, according to my numbers (which, by their nature are educated guesses), there are just 50 alien civilizations that we could communicate with.