## How many intelligent extraterrestrial civilizations are there in the galaxy?

In order to estimate the number of extraterrestrial civilizations capable of communicating within our Galaxy – the Milky Way – the astronomers use a mathematical formula called Drake equation e. The name comes from Frank Drake, the US astronomer and astrophysicist who first issued it. In the game we are proposing – realized with Scratch – you can estimate the number of intelligent civilizations in our Galaxy by using a simplified version of this formula. The original formula contains seven terms, whereas here we only have three terms: A: number ofLEGGI TUTTO