'What-if' an advanced ET were to notice Earth?...

So, the Sci-Fi movie "Skyline" is a possible scenario? That's scary.

As far as detecting ET, I think we might be looking in the wrong place. I believe ET could be broadcasting in the noise. Why? The advanced ET's don't want to be bothered with rabble that are still living in caves and digging in the dirt, from their point of view. They've all been where we are now, searching in the quiet band and finding nothing.

As time passed, their science and knowledge flourished until they discovered the 'key'. A relationship, a ratio, the unification theory, something that gave them the ability to distinguish order from the chaos of background noise. The noise isn't all just noise. We're not there, yet.

Hey, this was supposed to be Sci-Fi, right?? :)

Lt

I think it is just as plausible that if ET were to notice our existence they would make a log entry, verify that we can barely get ourselves into orbit, notice we are on the brink of our own demise and make a note to check back later.
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Bob DeWoody

We have well-known signal processing techniques that will bring a signal up out of the noise. Noise is random but follows a well known Gaussian curve. When a signal is auto correlated or cross correlated it will jump up out of the Noise.

Noise will appear on any band. Thermal noise in the receiver as well as background radiation.

If it was generated by anything other than spontaneous conditions........that is what we search for, my friends.

Is the Hubble telescope, Keppler and other telescopes fit with radio receivers, if yes, could these telescopes detect a non-Earth signal?

Is the Hubble telescope, Keppler and other telescopes fit with radio receivers, if yes, could these telescopes detect a non-Earth signal?

The following article makes the situation with this new paper clearer. One of the authors, and not the main one, has an academic affiliation with the NASA. He did not help write the paper as part of his work there. The report was not commissioned, sanctioned or endorsed by the NASA. The news media mistakenly made it seem otherwise. http://cosmiclog.msnbc.msn.com/_news/2011/08/19/7419399-what-if-et-thinks-were-evil

Define "advanced ET".

http://en.wikipedia.org/wiki/Kardashev_scale



Lt

Isn't this "what if" thread supposed to be about ET detecting us? Our detection capabilities have nothing to do with an ET civilization detecting our presence on earth.
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Bob DeWoody

They wouldn't notice much. Or, would they ?

They might see that there is oxygen here so that there almost certainly is some form of life. They might detect coherent and radar type emissions and conclude that there were creatures, possibly similar to themselves. Since we are not broadcasting a beacon they would have to be in close in relative terms.

If they could decode our Television signals they would know pretty much how we looked and what life was like here on earth.

I believe they would have to be well within 100 light years and I don't believe that there is a high probability that there is other intelligent (like us ) life within this radius?

Would they come to conquer us ? They would be too far away.