New look at first black hole detected shows it is bigger than expected

By Will Dunham WASHINGTON (Reuters) - A fresh examination has revealed new details about the first black hole ever detected - which was spotted in 1964 and became the subject of a friendly wager between renowned scientists - including that it is bigger than previously known. Researchers said on Thursday that new observations of the Cygnus X-1 black hole, orbiting in a stellar marriage with a large and luminous star, showed it is 21 times our sun's mass, about 50% more massive than previously believed

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