Today in Science history —> On this day 104 years ago, Albert Einstein presented the paper “Kosmologische Betrachtungen zur allgemeinen Relativitätstheorie” (“Cosmological considerations in the general theory of relativity”) at the weekly meeting of the Prussian Academy of Sciences in Berlin. The pivotal research, often overlooked amid Einstein’s many accomplishments, applied his newly minted general theory of relativity to the universe as a whole. The study of cosmology would never be the same again. Despite the shortcomings of Einstein’s model universe, the paper was a major advance at a time when many astronomers believed that the Milky Way constituted the entire universe.
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