can we power a light bulb with positrons?
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Mar11-09, 03:05 PM
how would we determine whether some (half?) of the millions of galaxies we see through the Sloan Digital Sky Survey and other telescopes were made of antimatter?
You can't - the only reason to think they aren't is that you don't see the x-rays from where their anti-interstellar medium meets out interstellar medium.