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Posted by Jim on August 9, 2001 20:26:44 UTC

Radio waves (a type of light) is a cheap, easy way to communicate through space.

Changing the sun is seemingly out of the question, but you could put a satellite in far-orbit around the sun that concentrates/amplifies the sun's rays into a signal.

A powerful laser could be used for interstellar comminication (SETI is starting up an Optical-SETI program to search for such signals in addition to their regular radio wave search).

As far as I know, no planets have been discovered around the alpha-centauri system yet. The search goes on. Planets around other stars are hard to detect because they're so much dimmer and smaller than the stars they orbit.

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