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If such a signal was ever to be detected how will SETI confirm from which point it arose from and send a response in that general direction.
Originally posted by Gazrok
Say an alien civilization last used radio 5000 years ago. They're at such a distance, that the waves take 10000 years to reach us. So, those waves have only made it halfway to us so far!!! (even though they stopped using them 5000 years ago!)
Likewise, lets say they used them 20000 years ago. The signals got here while we were still chasing herds and writing on cave walls.
Originally posted by Badge01
First, mastery of the fundamental forces, mechanical, electrical, magnetic, weak and strong nuclear forces and gravity will be part of any advanced civilization's progress, unless you postulate that all aliens are like the Farscape living spaceship.
If you've ever seen the movie Contact, you'll know the alien-hunter stereotype: quirky, visionary loners who sit up all night listening to static, hoping for the signal that will change the world. That's probably not far off from real life, except that SETI (that's Search for Extra-Terrestrial Intelligence) scientists are getting creative. Here at the Astrobiology Science Conference, 2008, they're presenting new ways of looking for little green men, including watching for signs of alien lasers, infrared signals, and even gravity waves.
SETI scientists have been looking for alien lasers for years now — part of the Optical SETI programs several universities and observatories across the country.
Those projects are still going full-bore, but scientists are hoping to increase their chances of success by building a detector that will look for near-infrared lasers, too. Just on the lower edge of the optical range of electromagnetic wavelengths, Andrew Howard and colleagues from UC Berkeley figure there's no good reason aliens wouldn't build a near-IR laser. And if they did, they'd obviously use it to broadcast complex signals to Earth containing detailed plans on how to build a device for interstellar travel.
Maybe that's getting a bit ahead of ourselves, but just in case, we'd better look for intelligent signals broadcast through gravity waves, too. These still-theoretical ripples in space-time are being tested for by the LiGO (Laser interferometry Gravitational wave Observatory) detector, mostly as a way to test astronomical theories. At least one researcher, Peter Hahn believes we should start analyzing the data for signs of ET, too.
Originally posted by Lannock
Originally posted by Badge01
First, mastery of the fundamental forces, mechanical, electrical, magnetic, weak and strong nuclear forces and gravity will be part of any advanced civilization's progress, unless you postulate that all aliens are like the Farscape living spaceship.
Why??
Again I say that's the HUMAN way of thinking. I presume you are human, but when we are trying to contact aliens we must NOT assume that ALL alien civilizations advanced the same way humans did. I would say we have a similar chance of intercepting an alien radio broadcast as Earth has of being destroyed by a comet/asteroid/etc.
Originally posted by Anonymous ATS
What would the Internet sound like if all signals were converted to sound? could you hear spoken words or phrases? That is how phony seti is.....
In 1959 two scholars (Philip Morrison at Cornell University and Frank Drake at NRAO) independently recognized that the hydrogen line would be a likely frequency for interstellar beacons. They reasoned that more advanced civilizations would reason that young civilizations (like ours) might already be listening there. Based upon that circular reasoning, Morrison went on to co-author the world's first modern SETI article ("Searching for Interstellar Communications," Nature 184(4690):844-846, September 19, 1959), and Drake conducted a the first modern SETI study, "Project Ozma," a hydrogen line search of two nearby Sun-like stars for possible artificial signals.