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I suppose they are more than 10 light years away, so I guess if we want to talk then we transmit then wait for a long time. This earth like planet was 2700 light years away: http://www.nbcnews.com/science/8-8-billion-habitable-earth-s...

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You don't transmit and wait, you just keep talking* - we've essentially been doing this since radio broadcasts began, but we haven't heard/recognized a response yet...

*I thought this was a NASA quote, but I probably got it from a science fiction story somewhere?

You're probably thinking of Isaac Asimov's story "My Son, the Physicist".

http://en.wikipedia.org/wiki/My_Son,_the_Physicist

There are a ton of candidates in our cosmic neighborhood (less than 70 light years away).

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