On Fri, 21 Aug 2015 08:52:36 +0100, Brian Howie wrote:
In message , John S writes:

It is my understanding that interstellar space (between galaxies) is
about as good a black body as can be obtained. If a source is directed
into that space, I very much doubt a return could be detected by mortals.

Yes it's an infinite heat-sink.

More properly like an infinitely long piece of coax.

Jonesy
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Marvin L Jones | W3DHJ | W3DHJ | http://W3DHJ.net/
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