Formerly About Advanced Micro Devices Message Board

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Politics : Formerly About Advanced Micro Devices

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To: tejek who wrote (563919)	4/30/2010 8:48:36 PM
From: combjelly	Read Replies (2) of 1575380

"its probably safe to assume that there are no extraterrestrial civilizations within 30-35 lite years of Earth........1/2 of 70 broadcasting years." Probably. The Drake equations try to quantify the probability of there being other civilizations out there. en.wikipedia.org Using the original values, you would expect there to be about 10 such civilizations in the galaxy. In that case, the odds are pretty close to zero that one would be within 35 light years of Earth. But, there are reasons to think his figures might be way too conservative. But, even so, a sphere 70 light years in diameter is an extremely small fraction of the galaxy. Our galaxy is 100k light years across and about 1000 thick. It is a big place. So, if there was a civilization that close at anywhere close enough to our level so that we could recognize each other as intelligent races, the galaxy is a very crowded place...

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