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Detectability of Extraterrestrial Technological Activities

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Author Topic: Detectability of Extraterrestrial Technological Activities  (Read 698 times)
Jennifer Murdoch
Superhero Member
Posts: 5235

« Reply #30 on: February 04, 2010, 01:25:21 pm »

Following the same  kind  of  ideas,   Philip   Morrison   discussed
       (Sullivan, 1964) converting one's sun into a signaling light by
       placing a cloud of particles in orbit around it.   The  cloud  would
       cut enough light  to  make  the  sun appear to be flashing when seen
       from a distance, so long as the viewer was close to the plane of the
       cloud orbit.  Particles about one  micron in size, he thought, would
       be comparatively resistant  to disruption.  The mass  of  the  cloud
       would be comparable  to  that of a comet covering an area of the sky
       five degrees wide, as seen from  the  sun.   Every  few  months, the
       cloud would be shifted to constitute a slow form of  signaling,  the
       changes perhaps designed to represent algebraic equations.

       Reeves (1985) speculated  on  the  origin of mysterious stars called
       blue stragglers.  This class of star was first identified by Sandage
       (1952).  Since that time, no clear  consensus upon their origins has
       emerged.  This is  not,  however,  due to a paucity  of  theoretical
       models being devised.   Indeed,  a  wealth of explanations have been
       presented to explain the origins of  this star class.  The essential
       characteristic of the blue stragglers is that they  lie on, or near,
       the Main Sequence,  but  at  surface  temperatures  and luminosities
       higher than those stars which define the cluster turnoff.
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