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/sci/ - Science & Math

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3112934 No.3112934 [Reply] [Original]

It's pretty common knowledge that ever since we got radio, we've been broadcasting to the entire galaxy, and that this bubble of information is about 70 lightyears around our planet.

Now, is there any reason to believe that there might be some Doppler effect on this stream of information, so that when we at some point stop broadcasting, then it will compress into a wave of accumulated information that would last a mere amount of seconds instead of being a stream of continuous information?

The "Wow!" signal got me thinking about this. Because if it is possible for the stream of info we're sending out to accumulate over time, then the "Wow!" signal might be the remnant of a civilization that once existed, perhaps centuries of information compressed into that bit of data we picked up.

>> No.3112942

>>3112934
Ya think someone would have already thought of that eh OP?

>> No.3112955

>>3112942
I don't know, that's why I ask.

>> No.3112960

>>3112955
if any thing the wave would be red shifted by the expansion of space and become longer or less compressed

>> No.3112968

>>3112960
But what about obstacles on the way that might slow it down?

>> No.3112978

>>3112968
This is an electromagnetic wave we're talking about. It will most likely diffract around them.

>> No.3112979

>>3112978
"Most likely" you say.

>> No.3112984

>>3112960
Red shifting from universal expansion only occurs on scales so large that it wouldn't matter [we don't put enough power into the broadcast for it to be discernible from the background at those distances].

As for the OP, no. It is not possible because nothing is moving fast enough towards us [and we aren't moving fast enough towards anything].

>> No.3112988

>>3112984
Alright, thanks for answering straight up.

>> No.3112992

>>3112978
Diffract around a planet? It will diffract, but the diffraction is so negligible that it would probably only be noticeable on distance scales of the intergalactic level, but then our signal has less power than the background signal and doesn't matter.

>> No.3112995

>>3112992
I was thinking space dust, small rocks and shit.

Even then I cant think of a single effect which could compress radio waves transmitted through space.