archive: Re: The Drake Equation (Re: [ASTRO] SETI- Our chances (LONG))

Re: The Drake Equation (Re: [ASTRO] SETI- Our chances (LONG))

Dr. H. Paul Shuch ( (no email) )
Thu, 17 Dec 1998 09:38:09 -0500

At 09:26 AM 12/17/98 -0500, Larry Klaes wrote:

>At 10:23 PM 12/16/1998 +0100, Johannes Holmertz wrote:

>>I wonder what answer Frank Drake got?

Last time I asked him (about a year ago), Frank was estimating 10,000
communicative civilizations in the Milky Way galaxy. So why haven't we
heard them? Caclulate the density of those 10,000 civilizations in a disk
100,000 LY across, and then the average distance between civilizations.
It's something over 1000 LY. Project Phoenix, for example, targets stars
within 200 LY of Earth. Our technology just doesn't look far enough.

H. Paul Shuch, Ph.D. Executive Director, The SETI League, Inc.
433 Liberty Street, PO Box 555, Little Ferry NJ 07643 USA
voice (201) 641-1770; fax (201) 641-1771; URL
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"We Know We're Not Alone!"