Whose equations first described an expanding, dynamic universe instead of a static one?
Quick Answer
Alexander Friedmann’s 1922 equations showed that general relativity allows the universe to expand or contract. They became a foundation of modern cosmology.
The Full Story
Alexander Friedmann, a Russian mathematician and physicist, published solutions to Einstein’s field equations in 1922 that described a changing universe. His work showed that space itself could expand or contract, even before observations confirmed that the cosmos is not static. Friedmann’s models helped launch modern theoretical cosmology and are now central to Big Bang cosmology. His name lives on in the Friedmann equations used in standard cosmology today.
Key Facts
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"The math that made the expanding universe possible"
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