Taking a hint from Dirac's large number hypothesis, we note the existence of cosmologically combined conservation laws that work cosmologically long time. We thus modify Einstein's theory of general relativity...Taking a hint from Dirac's large number hypothesis, we note the existence of cosmologically combined conservation laws that work cosmologically long time. We thus modify Einstein's theory of general relativity with fixed gravitation constant G to a theory for varying G, with a tensor term arising naturally from the derivatives or G in place of the cosmological constant term usually introduced ad hoc. The modified theory, when applied to cosmology, is consistent with Dirac's large number hypothesis, and gives a theoretical Hubble's relation not contradicting the observational data.For phenomena of duration and distance being short compared with those of the universe, our theory reduces to Einstein's theory with G being constant outside the gravitating matter, and thus also passes the crucial tests of Einstein's theory.展开更多
银河以外的夜天是非常暗的.这个看来十分浅显的观察事实,对于宇宙论却有着深刻的含意,它涉及到了大宇宙时空的特性和物质分布等基本性质。正因为如此,关于夜黑问题的正确研究,成为现代宇宙学的先声.19世纪,德国天文学家亨利希·奥...银河以外的夜天是非常暗的.这个看来十分浅显的观察事实,对于宇宙论却有着深刻的含意,它涉及到了大宇宙时空的特性和物质分布等基本性质。正因为如此,关于夜黑问题的正确研究,成为现代宇宙学的先声.19世纪,德国天文学家亨利希·奥尔勃斯(Heinrich Wilhelm Matthus Oblers)为了解决夜黑问题,作出了关于宇宙的一系列简单的假设,但由于当时对宇宙认识的局限性和片面性。展开更多
文摘Taking a hint from Dirac's large number hypothesis, we note the existence of cosmologically combined conservation laws that work cosmologically long time. We thus modify Einstein's theory of general relativity with fixed gravitation constant G to a theory for varying G, with a tensor term arising naturally from the derivatives or G in place of the cosmological constant term usually introduced ad hoc. The modified theory, when applied to cosmology, is consistent with Dirac's large number hypothesis, and gives a theoretical Hubble's relation not contradicting the observational data.For phenomena of duration and distance being short compared with those of the universe, our theory reduces to Einstein's theory with G being constant outside the gravitating matter, and thus also passes the crucial tests of Einstein's theory.
文摘银河以外的夜天是非常暗的.这个看来十分浅显的观察事实,对于宇宙论却有着深刻的含意,它涉及到了大宇宙时空的特性和物质分布等基本性质。正因为如此,关于夜黑问题的正确研究,成为现代宇宙学的先声.19世纪,德国天文学家亨利希·奥尔勃斯(Heinrich Wilhelm Matthus Oblers)为了解决夜黑问题,作出了关于宇宙的一系列简单的假设,但由于当时对宇宙认识的局限性和片面性。
