High Quality Content by WIKIPEDIA articles! The spherically symmetric dust solution of Einstein's field equations' was first found by Lemaitre in 1933 and then Tolman in 1934. It was later investigated by Bondi in 1947. This solution describes a spherical cloud of dust (finite or infinite) that is expanding or collapsing under gravity. It is also known as the "Lemaitre-Tolman-Bondi metric" and the "Tolman metric". Richard Chace Tolman (March 4, 1881, West Newton, Massachusetts – September 5, 1948, Pasadena) was an American mathematical physicist and physical chemist who was an authority on statistical mechanics. He also made important contributions to theoretical cosmology in the years soon after Einstein's discovery of general relativity. He was a professor of physical chemistry and mathematical physics at the California Institute of Technology.

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