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From: JTEM <jtem01@gmail.com>
Newsgroups: talk.origins
Subject: Re: New SETI search
Date: Tue, 3 Sep 2024 01:58:46 -0400
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  Mark Isaak wrote:

> If I had vast technological resources and wanted to send an "I'm here" 
> signal to unknown aliens over potentially vast distances, I wouldn't 
> generate light. That would take way too much energy, especially if it 
> was broadcast widely. Instead, I would rig up some opaque sheets and set 
> them orbiting around a star, with gaps in places so that anyone watching 
> from the plane of orbit would see a dit-dah message spelled out 
> repeating every 6 (of our) months or so.  It would work only on a fairly 
> narrow plane, but at least it's better than a laser pointed at a single 
> target.

Not necessarily. No.

We've only been in the Exoplanet game for maybe 35 years or so, and
already we have technology that can detect potential biosignatures
out to hundreds of light years away. If a civilization really is as
advanced as it posited here then, either thanks to time or technologies
we can yet imagine, they wouldn't be sending their signals out to
random planets but the planets most likely to support life!

Put short:  Any message would be optimized for success.

> Is SETI set up to look for anything like that?

SETI is not in the "Finding aliens" business, and they certainly would
never tell you if they did. We know this because every time they did
find a juicy signal THAT WE KNOW OF they kept it secret. The public
only ever found out about them AFTER they were judged innocuous.



-- 
https://jtem.tumblr.com/tagged/The%20Book%20of%20JTEM/page/5