The shape of the universe is determined by a struggle between the momentum of expansion and the pull of gravity. The rate of expansion is expressed by the Hubble Constant, Ho, while the strength of gravity depends on the density and pressure of the matter in the universe.
Some of the most extraordinary discoveries in Science are explained by the work of one man— Albert Einstein. Even after 100 years of announcing his Theory of Gravity / General Relativity, Science continues to be moved by it.
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