On 30-3-2010 13:46, scott wrote:
>> How about the fact that the stars of the universe are all red-shifted 
>> the farther they get from *us*?
> 
> Once you have the information about the surrounding stars, isn't it 
> quite trivial to show that from the point of view of *any* star, all 
> other stars are red-shifted more the further away they are?
> 
>> Or the fact that we seem to be the only creatures in the entire 
>> *universe* that broadcast radio signals?
> 
> Why the assumption that any intelligent lifeform would be broadcasting 
> radio signals for any significant time in its existence?  To me that 
> seems silly. Earth has been broadcasting radio for 100 years out of 4.5 
> billion, maybe we will continue to do so for another 10000 years until 
> we find something better? 

50 or 100 is a better estimate. We are already shutting down the 
Megawatt analog radio and TV transmission towers. Transmitters are 
continuously moving to less output and wider spectrum. Total power 
transmitted to outer space is decreasing and becoming less recognizable.

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