Word: cygnus
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Dates: during 1960-1969
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...their advanced skills, the sci entists of Cygnus made two important errors. In the first place, the signal they received contained no message at all. It came straight from Indonesia, where the volcano Krakatoa had erupted elev en years before, generating meaningless radio waves with its churning plasma...
Radio Galaxy. The strongest "radio star" in the sky had the astronomers baffled for many years. Its powerful waves came from a patch of sky in the constellation Cygnus, and optical astronomers could find nothing there. At last the Palomar telescope, guided by a new and extremely accurate radio fix, photographed an extraordinary scene that looked like a collision of two enormous galaxies 500 million light-years away. Galaxy collisions are possible, though unlikely, and they might emit radio waves because of churning gases between their hundreds of billions of stars...
...most radio astronomers no longer think that such a collision can properly explain the stupendous radio energy that streams out of Cygnus A. For one thing, the energy does not come from the central part that is optically visible. Strangely, it comes from two 'spots on opposite sides of the center. The sky is full of these double radio sources. One theory holds that they are galaxies that have exploded. Electrons released in the explosions may have been steered by magnetism and finally gathered at spots far away from the central wreckage. A vast catastrophe of this sort might...