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Assuming that an alien civilization would strive to optimize costs, limit waste and make its signaling technology more efficient, Jim Benford, founder and president of Microwave Sciences Inc., proposes that these signals would not be continuously blasted out in all directions but rather would be pulsed, narrowly directed and broadband in the 1-to-10-gigahertz range. The physics professor says. “Whatever the life form, evolution selects for economy of resources. Broadcasting is expensive, and transmitting signals across light-years would require considerable resources.”
“This approach is more like Twitter and less like War and Peace, ” says James Benford,
The concept of short, targeted blips — dubbed “Benford beacons” by the science press — has gotten extensive coverage in such publications as Astronomy Now. Well-known cosmologist Paul Davies, in his 2010 book The Eerie Silence: Renewing Our Search for Alien Intelligence, supports the theory.
This means that SETI — which focuses its receivers on narrow-band input — may be looking for the wrong kind of signals. The Benfords and a growing number of scientists involved in the hunt for extraterrestrial life advocate adjusting SETI receivers to maximize their ability to detect direct, broadband beacon blasts.
But where to look? The Benfords’ frugal-alien model points to our own Milky Way galaxy, especially the center, where 90 percent of its stars are clustered.
“The stars there are a billion years older than our sun, which suggests a greater possibility of contact with an advanced civilization than does pointing SETI receivers outward to the newer and less crowded edge of our galaxy,” Gregory Benford says.
“Will searching for distant messages work? Is there intelligent life out there? The SETI effort is worth continuing, but our common-sense beacons approach seems more likely to answer those questions.”
Despite our best search strategies, are signals from E.T. manifested in anomalous flashes of radio energy from our galaxy that are missed, or dismissed as natural phenomena? Maybe alien transmissions are popping off all around us but we just aren’t looking at the right place or right time to see them.
In a recently published paper by James Benford and Dominic Benford of Microwave Sciences in Lafayette, California, the authors imagine that SETI beacons might be much like a lighthouse, sweeping the galactic plane in a raster pattern. Depending on beam size and scan rate, many days could pass between the brief Twitter-like bursts of “here we are” flashes from alien civilizations.
"We should learn how to identify any such beacons," the authors say. For starters they expect the beam would pulsate to conserve energy and also have amplitude or frequency modulation of the carrier to draw attention to itself.
Originally posted by Droogie
Source: Galaxy Daily
Originally posted by TrueBrit
I believe its this sort of science which will open our eyes to the other residents of the universe, rather than grandaddy radio.