42.The ____________________ that the universe both isotropic and homogeneous.
43.The ____________________ : 1777277
42.The ____________________ is that the universe is both isotropic and homogeneous.
43.The ____________________ are theories that unify the electromagnetic, weak and strong forces at extremely high energies.
44.A(n) ____________________ universe is infinite and would have a density equal to the critical density.
45.____________________ are a form of dark matter that consists of very low mass stars and planets too faint to be seen.
46.The measured temperature of the cosmic background radiation is ____________________.