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Featured on September 21, 2022

Members of a Lick Observatory expedition in Australia prepare to film a total solar eclipse on October 21, 1922. By measuring the positions of stars that appeared near the eclipsed Sun, the astronomers confirmed a 1919 finding that demonstrated that Albert Einstein's theory of gravity, known as General Relativity, was correct. [Special Collections and Archives, University Library, UC Santa Cruz]

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Scientists prepare to film a 1922 solar eclipse to test Einstein's theory of gravity

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Two stars trying to get in sync

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