Stellar Ages and an Extended Theory of Gravitation

Some consequences on stellar ages of the time-varying physical constants as deduced from a modified form of Dirac's hypothesis are discussed. The variation of the gravitational "constant " is shown to be consistent with a Jordan theory of gravitation. The variation with cosmic time of the fundamental constants of physics as deduced from an extension of the well-known hypothesis of Dirac1) was consid-ered by us in a previous work. 2) Under some reasonable assumptions, it was shown that the so-called coincidences between the very large dimensionless num