Thursday, September 30, 2010

A habitable planet around Gliese 581

Twenty light years away an ancient largeish planet is tidally locked to a red giant.

The star system is about 9 billion years old.  Time enough.

The last time I ran a Drake Equation estimate I ended up with between 10 and 170 civilizations currently active in our galaxy. This data point pushes the posterior-probability to the higher end of that range.

We don't run into them though. So they must all be pretty darned shortlived ....

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