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This has been "known" since the 60s. The Drake equation estimates the number of habitable planets in the universe. http://en.wikipedia.org/wiki/Drake_equation h
by andr 18y ago
This has been "known" since the 60s. The Drake equation estimates the number of habitable planets in the universe. http://en.wikipedia.org/wiki/Drake_equation http://en.wikipedia.org/wiki/Drake_equation
- likpok 18y agoRather poorly though. It takes several numbers for which we have no idea of a reasonable guess, multiplies them to get a number. The best we can say about this number (pretty much) is that it is in the interval (0,1]. Which is what you get by the definition of a probability. We then multiply this by several other (somewhat) arbitrary constants to get a number.
- omarchowdhury 18y agoThe Drake equation is just a guess based on other guesses.
- andr 18y agoTrue, but a more educated guess than "billions".