One of astronomy's deepest mysteries is the "radio star," an object in space that "shines" with radio waves instead of with .visible light. The first radio stars were discovered only about two years ago, but already more than 100 have been plotted on the sky maps. They occupy positions which do not correspond to any visible stars. Astronomers do not know what they are or how they send out their waves.
In last week's Nature magazine, R. Hanbury Brown and C. Hazard of Britain's University of Manchester announced that they had detected radio stars in M. 31, the great spiral nebula in...
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