As you’ve probably heard by now (and definitely heard if you’re a regular GFR reader), the Kepler telescope’s (RIP) search for potentially habitable planets has been wildly successful. There are thousands of planets that might support life, but the bad news is that most of these are millions or billions of light years away, which means that in order for that to do us any good, we’d need to master manned interstellar travel, which is going to take us some time. But a recent discovery might change all that. Thanks to Kepler data, scientists have discovered that there are a bunch — possibly even billions — of Earth-like planets inside our own Milky Way.
The Milky Way has somewhere around 200 billion stars. Astronomers estimate that one in every five of these stars has at least one planet orbiting around it that is the right temperature to support the existence of liquid water on its surface, and thus, life. That’s at least 40 billion planets, and maybe far more. Of those 200 billion stars, roughly 40 billion are similar to the Sun, which means that those stars support at least 8 billion planets, and maybe more.