Well this is interesting ...

[Tony Scharf]

>>Like you say, If they can/could do that ~1500 years ago they most likely know about us and, lets face it, could probably get here as well.
Well, they man know a planet exists in the habitable zone and be able to see that it has life (oxygen atmosphere is a dead giveaway).  They wouldn't know if it was technologically based.  That they will find out in a little less than 1500 years time since we only started putting out enough radio signal about 50 years ago.  Give them a little time to respond, and I'd say we'd see them knocking on our door in ~4500 years.  We we have some time to get our shit together I'd say. 
The question is, of course, if they did come here...what would their purpose be.  Lets just hope it would be a benign curiosity.  
Tony

Subject: Re: Well this is interesting ...
To: music-bar at lists.music-bar.org
From: jammer at jammer.biz
Date: Thu, 15 Oct 2015 15:14:44 +0100


  
    
  
  
    

    

    On 15/10/2015 14:51, Tony Scharf wrote:

    
    
      
      ..and somewhat terrifying.  If it *is*
        an alien technology and not some natural phenomenon, it would
        belong to a species that was that advanced ~1500 years ago.   If
        we can detect them, it's all but certain they could, and
        probably have, detected us...
        

        
        Tony 

          
      
    
    

    Indeed, seems that everyone that has looked at it has marked it as
    at least worth spending more time looking at.  I think the quote
    from Arthur C Clark chimes well here:

    

    “Two possibilities exist: either we are alone in the Universe or we
    are not. Both are equally terrifying.”

    

    Also kinda fits in with what Michio Kaku and others have been
    saying.  The types of civilisations potentially out there based on
    their energy production/consumption.  This potentially fits in with
    the REALLY advanced type III civilisations that are capable of
    directly harnessing entire stars as energy sources.

    

    Like you say, If they can/could do that ~1500 years ago they most
    likely know about us and, lets face it, could probably get here as
    well.

    

    Utterly Terrifying®

  


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