In 1851, Jean-Bernard-Leon Foucault suspended a pendulum, (later named the Foucault pendulum), from the dome of the Pantheon in length of th

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In 1851, Jean-Bernard-Leon Foucault suspended a pendulum, (later named the Foucault pendulum), from the dome of the Pantheon in length of the arm was 67m. It was the first demonstration of the Earth's rotation with a purely indoors experiment.

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Photo credit: © BABAK TAFRESHI/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: astronomical, astronomy, church, earths, earthss, foucault, france, french, historic, historical, history, pantheon, paris, pendulum, rotation, science, scientific