A Brief History of Time
Random House Publishing Group, 1998 M09 1 - 240 páginas
#1 NEW YORK TIMES BESTSELLER
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... radiation . We have no direct evidence as to whether the matter in other galaxies is made up of protons and neutrons or antiprotons and anti- neutrons , but it must be one or the other : there cannot be a mixture in a single galaxy ...
... radiation at a certain rate . It is a matter of common experience that if one heats up a poker in a fire it glows red hot and emits radiation , but bodies at lower temperatures emit radiation too ; one just BLACK HOLES AIN'T SO BLACK 107.
... radiation at a much greater rate . A primordial black hole with an initial mass of a thousand million tons would have a lifetime roughly equal to the age of the universe . Primordial black holes with initial masses less than this figure ...
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