[ExI] Wrong frequency? Astronomers rethink where to hunt for alien signals

[Keith Henson]

How in the world do you dim a star at a few hertz rate? True, Tabby's star
dims, but that is an object moving in front of it. In that case, it is in
an 18-year orbit.

A slatted blinker would do the job, but it would have to be lined up
exactly with the target, and it would not stay lined up if it were in
orbit. Crazy idea when you can just use a laser.

Keith


On Mon, Jul 27, 2026 at 2:30 PM <spike at rainier66.com> wrote:

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> *From:* extropy-chat <extropy-chat-bounces at lists.extropy.org> *On Behalf
> Of *Keith Henson via extropy-chat
> *Subject:* Re: [ExI] Wrong frequency? Astronomers rethink where to hunt
> for alien signals
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> A very slow data rate is still a stupid idea.
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> The US uses a slow data rate to communicate with subs. The antennas are
> incredibly long.
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> Keith
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> *Sure.  But if the star’s light is analogous to the AM carrier frequency,
> how long is the requisite antenna?  *
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> *Your eyes will do.  Some basic instruments to record the dimming over the
> distance, you are ready to receive.  Everything within thousands of light
> years can easily receive that signal.*
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> *spike*
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