While the Earth 🌎 rotates underneath, the orientation of the #pendulum changes. First used in 1851, Foucault's pendulum was the first simple, direct way to observe Earth's rotation. 🎵: Fin Draper | Griffin Museum of Science and Industry

23 reactions | Did you know the Foucault Pendulum at the Indiana State Museum is a reproduction of an experiment first thought up by French astronomer and physicist Jean Bernard Leon Foucault? In 1851, Foucault used a swinging pendulum to show the effect of the Earth’s rotation! | Indiana State Museum | Facebook

It doesn't look a day over 21! Foucault's Pendulum, first modeled on this day in 1851, is turning 167, so we thought we'd celebrate with our resident pendulum  | Houston Museum of Natural Science - Sugar Land | Facebook