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

Enjoy this 360° view from the base of our iconic Foucault’s Pendulum. Be sure to look around in all directions to fully experience this wonder of science. http://bit.ly/1IP6tHV The 4-story Foucault’s Pendulum at The Franklin Institute is designed to demonstrate the nature of the Earth’s rotation. Over the course of a day, the instrument swings in a constant direction; however, as the Earth turns underneath it, the pendulum appears to move in a circular direction. | The Franklin Institute

On this day in 1851, Jean-Bernard-Leon Foucault first demonstrated the nature of the Earth’s rotation experimentally using a pendulum. Later and larger experiments further validated Foucault’s research. The same effect is demonstrated by our own four story Foucault’s Pendulum every day. Learn more: http://bit.ly/1IP6tHV | The Franklin Institute