Podcast: Counting Aliens with the Drake Equation

By Fraser Cain - February 12, 2007 07:51 PM UTC | Astrobiology

If you're wondering how many extraterrestrials there are in our galaxy, you just have to use a simple equation developed by astronomer Frank Drake in 1961. Just find out how many stars there are, how many support life, how many advanced societies form, and a few other details and we'll be set.

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Drake Equation

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Fraser Cain

Fraser Cain is the publisher of Universe Today, founding the website in March 1999. He's also the co-host of Astronomy Cast.