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

Everyone loves watching the Foucault Pendulum at the museum. We created this special video to explain just how it works. Throughout the day, the direction of the pendulum’s swing appears to change. Actually the Earth is turning under the pendulum as it swings. At Houston’s latitude (30° N.) the pendulum will precess through 180° or halfway around each day. During this time, it will knock down all of the pins. Learn more: http://www.hmns.org/exhibits/permanent-exhibitions/pendulum/ | Houston Muse

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