Royal Astronomical Society, Piccadilly, St. James's, Westminster, Mayfair, City of Westminster, Greater London, England, W1J 0PA, United Kingdom
Royal Astronomical Society
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Wikipedia's[1][2][3] Eddington experiment article dates the session: "The presentation of the results at the joint 6 November 1919 session of Royal Society and Royal Astronomical Society led to intensive press coverage first in Great Britain and a few days later in the US press". The eclipse itself was on 29 May 1919; this pin is the announcement, which is what made Einstein famous.Arthur Eddington presents the results of the May 1919 eclipse expeditions to Principe and Sobral at a joint session of the Royal Society and the Royal Astronomical Society at Burlington House. The measured deflection of starlight matches Einstein's prediction, and the meeting accepts it.
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