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To mark the centenary of the 1919 solar eclipse that confirmed Einstein's theory of relativity, we'll take you along on the Joint Permanent Eclipse Committee's expeditions to Sobral, Brazil and Principe. Follow along in No Shadow of a Doubt, out 4/30. press.princeton.edu/titles/17193.h…
100 years ago today, Arthur Eddington and the rest of the team traveling to Sobral and Principe met at Burlington House in Piccadilly, London to finish planning for the expedition. The eclipse was just 3 months away. press.princeton.edu/titles/17193.h… 
Before setting off on this journey, meet the scientists leading the Principe and Sobral teams: Arthur Eddington and Frank Dyson.
