[ExI] kepler study says 8.8e9 earthlike planets

[Andrew Mckee]

On Mon, 11 Nov 2013 05:52:05 +1300, John Clark <johnkclark at gmail.com>  
wrote:

> Even if significant fusion does occur in the sun's corona, which seems
> extremely unlikely, I don't see what that would have to do with the  
> origin
> on life on Earth.

Merely speculating that two different sun models might have very different  
emission profiles, assuming of course anything essential for life does or  
can escape the suns gravity well.


> If there were a billion or even a million year old technological
> civilization in the galaxy that had not descended into navel gazing and
> lotus eating I don't think you'd need a star-ship to find it because it
> would be immediately obvious to anyone who looked at the night sky.

Maybe.

But do all technology trees necessarily result in civilizations  
broadcasting their existence out to the universe?

What about species evolved to be extremely fearful of doing anything that  
might call attention to themselves?

What if broadcasting your existence is really stupid because some stealthy  
Borg like race like nothing more than assimilating tech capable  
civilizations, blink at your telescope and you miss their rise and  
downfall.