Einstein's radius of the universe
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- For other topics related to Einstein see Einstein (disambiguation).
Einstein's radius of the universe is radius of curvature of space of Einstein's universe, a model universe that was supposed to represent our universe in idealized form. The radius of curvature of space of this universe (Einstein's radius) is , where c is the speed of light, G is the Newtonian gravitational constant, and ρ is the density of space of this universe. The numerical value of Einstein's radius is of order of 1010 light years.