Zum gegenwärtigen Stand der Diracschen kosmologischen Hypothesen
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Diracs two hypotheses about variation of the constant of gravitation and of the mass of the universe are discussed with regard to the remarks made byFierz concerning the authors attempt to give a coherent theory leading toDiracs two cosmological laws as its consequences. Though at first sight it seems that the results ofFierz would be contrary to the idea of any inconstancy of the mass of the universe, they do not make impossible a theory allowing separate threedimensional spaces to unite and to add their masses. A direct measurement of the variation of the constant of gravitation is not yet possible, but further progress of methods of measurement probably will allow a direct examination of this hypothesis. Many facts in the realm of geology and geophysics, and concerning the structure and history of the moon, to be discussed in detail elsewhere, indicate very strongly that diminution of the constant of gravitation during the development of the universe is an empirical fact. At the other handAmbarzumians results about formation of stars and galaxies strongly support the idea that these processes may be interpreted at the basis of uniting spaces.
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