Skybuck Flying wrote:

Hi,

Seeing all the bullshit in this newsgroup or maybe sci-fi... or maybe future
technology I thought I add some of mine hehehehe.

My idea is to use the SUN as a way to send a message to aliens ;)

We build a big shield around the sun. And then we can turn it on and off
like a lamp.

Won't work.  Shield reaches equilibrium temp and emits.  Who is going
to launch it, NASA?  Ha ha ha.
 

Yeah... because I don't believe that radio signals would ever get to the
other side of the galaxy... to much noise and stuff... so it's unrecnogzible
blabla whatever :D

So instead one needs a BIG, POWERFULL, SIGNAL ;)

And I think the sun is a pretty good BIG,POWERFULL, SIGNAL ;)

[snip]

Multi-gigawatt continuous CO2 laser using solar pumped Mars' or Venus'
upper atmosphere and orbiting mirrors.  Doable and not overmuch
expensive.  During slack periods, aim the output at the Middle East or
maybe Utah. 

Collimation and spectral purity count toward the bottom line.  Make it
obviously anthropogenic.

-- 
Uncle Al
http://www.mazepath.com/uncleal/
 (Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf