posted on Jan, 17 2008 @ 09:23 AM
While I applaud the SETI efforts, and I wish all great luck and success, if it hasn't been pointed out, I'd like to take the opportunity to do
so...for those visitors that may not know.
Many feel that since we haven't detected a signal yet, it means nothing is out there. These folks need to be educated on all of the variables
involved here. The Universe could be teeming with life and sending out signals left and right, but that STILL doesn't mean we'd detect a signal.
Huh? How could this be? Here's how:
Finding an alien signal is akin to searching a beach for a particular grain of sand. First off, lets consider there is an alien civilization that
discovered and used similar radio/television, etc. devices. This civilization could have existed 10,000 years ago, or maybe longer, or maybe just
5,000 years ago. Lets say they used these waves for about 500 years or so, before going to something new, that we haven't discovered yet or cannot
detect with current tech. But, the civilization is over 100,000 light years away. That means that all of those radio/tv waves are STILL on their way
This is the problem faced by SETI. We'd need to find just the right civilization, at just the right time, in just the right part of sky, etc. The
chances are slim, even if the Universe is teeming with civilizations, due to the distances involved and time it takes signals to travel...but that
certainly doesn't mean we can't look and hope. After all, we're just the right civilization, at just the right distance, from a star that is just
the right size and stability, so who knows?