Well, strangely enough, Carl Sagan thought the most likely
means of Contact would be aliens sending our own
radio transmissions back to
Which is eminently probable. See, aliens could spend CENTURIES trying to decode our radio and television transmissions and learn our languages...
OR.... They could simply take our signals and send them back to Earth.
I mean, we would KNOW something was odd if original televised episodes of I Love Lucy
from 1951 started raining down on Earth right about now,
eh? The aliens wouldn't have to send a specific message at all. All we have to do is calculate half of 61 years, the round trip of a radio wave, and
we will know that SOMEBODY about 30 light years away is trying to get our attention.
That would probably be in the vicinity of Vega, some 25 Light Years away.
We will thus know the aliens have something approximating radio-television technology, as well as a grasp of astronomy, inasmuch as they knew which
direction to transmit the return signal.
There may be millions of other, closer civilizations that have NOT developed radio technology, of course.
But here's something to think about...
Most of the signals we sent into space from the beginning of Radio up to about six years ago were analog
signals, okay? We are COMPLETELY
switching over to digital
transmissions now. We all had to get new televisions, right? Or at least get digital converters for our old analog
did we switch over from analog to digital?
Cleaner signal? Better resolution? Government control of ALL communications?
Or do they not want us watching analog television because there are OLD ANALOG SIGNALS returning to Earth
from other civilizations?
edit on 30-1-2012 by ZeskoWhirligan because: (no reason given)