Word: dualstar
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Dates: during 1970-1979
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...have identified a powerful X-ray source in the constellation Cygnus. Some suspect the source, which has been labeled Cygnus Xl, may be just such a black hole. It appears to be rotating with a visible star around a common center of gravity−a dead partner of a dualstar system. Scientists believe material from the glowing star is being drawn into the black hole with such force that the material becomes hot enough to emit X rays...
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