originally posted by: ctdannyd
The only possible way to communicate across the vast distances of the galaxy and, the universe would be utilizing gravity waves.
Gravity waves propagate at the speed of light the same as electromagnetic waves (radio, infrared, light, x-rays, etc).
As for using entangled particles for faster than light communication, it's been detailed elsewhere in other similar threads why it is impossible. In
short, in order to know what was sent a check must be performed and that check can not be sent faster than light so even quantum communications would
be limited by the speed of light.
As for wormholes and the like, brilliant idea if they exist. So far they are theoretical with no observed natural wormhole in astronomy nor
artificially produced one at the subatomic level.
As for radio being somehow "old fashioned" or "archaic", it seems to me most people who think this have just consumed so much sci-fi with "subspace
communicators" "quantum communicators" etc that they assume that because it was in fiction it must exist in some way in reality.
As for SETI - I've detailed elsewhere that SETI encompases more than just the radio search. And a lot of people misunderstand what SETI is looking for
in the radio search, it's not looking necessarily for communication. It's simply looking for radio signals which are artificially produced. Whether
they contain communication or information is a secondary question since simply finding radio signals of artificial origin perhaps from some sort of
alien radar array would be huge even if the signals (like our Earthly radar) contained little if any information.
Also radio signals might be a byproduct of many advanced technologies.
One example is the new "EM Thruster" under test by NASA:
The team was testing a theory that there’s a new way to propel satellites, instead of using rockets powered by a limited supply of fuel. So they
put a radio antenna in a specially designed, sealed container. Turned on, the antenna bounced 935MHz radio waves (similar to those used by some cell
phones) around, and the container apparently moved a tiny, tiny bit. This violates Newton’s third law of motion, one of the basic tenets of
Loosely put, Newton taught us that no action can occur without an equal and
opposite reaction. Because there is nothing pushing against the container, propelling it along—no hot gases exploding out the back, for example—it
shouldn’t be able to move. It’s like moving a broken-down car by pushing it from the inside.
In theory if this actually turns out to be a real and viable means of propulsion it should be detectable by SETI if used on massive alien
Perhaps the first radio SETI detection won't be a message at all, but a radar or the alien equivalent of a solar power satellite beaming power via
microwaves to free floating space colonies, or maybe one of these EM-thrusters in use by a massive starship?
Who knows? But if we don't look we will never know.
Hardly seems like a waste to be looking for anomalous radio signals now doesn't it?
edit on 19-8-2014 by JadeStar because: (no reason