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The Great Debate, also called the Shapley–Curtis Debate, was held on 26 April 1920 at the Smithsonian Museum of Natural History, between the astronomers Harlow Shapley and Heber Curtis. It concerned the nature of so-called spiral nebulae and the size of the universe.
Feb 22, 2024 · How Edwin Hubble proved in 1924 that the Milky Way is not the only galaxy in the Universe, using Cepheid variables as standard candles. Learn about the Great Debate of 1920 and the cosmic expansion that followed.
Apr 25, 2020 · Learn how two astronomers clashed in 1920 over the nature of the cosmos and the extent of the Milky Way. Find out how their debate influenced the discovery of galaxies and the modern view of the universe.
What was the Curtis-Shapley debate of 1920 debate about, and how did it change astronomy? A look back at the historic Great Debate on spiral nebulae.
The meeting of the National Academy of Sciences in Washington on 26 April 1920, at which Harlow Shapley of Mount Wilson and Heber D. Curtis of Lick Observatory both gave talks under the title "The Scale of the Universe", has passed into the literature as "The Great Debate".[1]
In 1920, the Academy was the scene of what has come to be called the “Great Debate” over the scale of the universe. The debate took place under the auspices of the George Ellery Hale Lecture series, and consisted of two lectures delivered during the Monday afternoon scientific session of the Academy’s 1920 Annual Meeting.
Feb 7, 2024 · How did Edwin Hubble prove that the Milky Way is not the only galaxy in the Universe? Learn about the Great Debate of 1920 and the cosmic expansion that followed.
