I've been up way too long so please forgive me if this isn't at all relative.
One thing, seti wouldn't transmit a signal.. waiting for a reply of sorts would be futile for the following reason, which I haven't seen around here
a lot despite it's pretty common knowledge.
I'm basing my example on the WOW-signal.
The signal originated somewhere in the direction of Sagitarius. the closest star in that direction is 220 ly away.
now of course the signal, if not a glitch (not ruled out), could also have originated anywhere between say 1 ly away and sagitarius.
but lets assume it's a signal coming from a planet around that star 220 ly away.
by the time we received the signal here that signal would have been 220 years old, as in broadcast 220 years ago.
say you would want to try and entice another signal from there and would send a transmission, you'd have to wait a whopping 440 years at the minimum
to get a reply.
and that's not even that far away with the dimensions of space being as they are.
somehow I just see to many people, another example, believing what they see in pretty hubble pictures to be the state stuff is in now.
but since light travels at lighspeed everything you see is in the universe from here is as far in the past as it is distant. If you look at a
supernova e.g. 1000 ly from here you're seeing a nova that happened a 1000 years ago.
same applies to radio signals.
ow well. I got the sneaky feeling im completely off topic. my brains fried from being up too long
anyway, I don't need seti to prove the existence of eti's. I already know they are out there.. it's a probability thing.
And as for the use of actually receiving a signal apart from verifying what we already know (common sense, logic and probability), I don't have a
If we receive a signal from somewhere near a star 1000ly away the civilization that sent it might be long extinct or at the very least heavily
changed, since a 1000 years have passed for the signal we picked up to reach us or in other words it was transmitted a 1000 years ago.
Untill we find a real world equivalent of subspace communications or stargates etc. interstellar communication isn't really practical.
Seti to me, while intruiging, is well.. throwing money away that could be used for more pressing matters.
Simply because the only thing it can do in regard to eti's is verify somewhat that there's is intelligent life out in the universe... Well... what
else is new? It's most likely, and i mean 99.9999....% for sure teaming with life out there. Scientist in the current day and age don't even dispute
that anymore at all.
[edit on 1-4-2007 by David2012]