165th Anniversary: Foucault Pendulum 

It was 165 years ago today (1851January 8) that Jean Bernard Leon Foucault of Paris invented aninstrument that would provide a conclusive physical demonstrationthat the Earth rotates on its axis. In fact, January 8 is now known as Earth's Rotation Day.
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http://spacewatchtower.blogspot.com/2016/01/165th-anniversary-foucault-pendulum.html

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| SpaceWatchtower: 165th Anniversary: Foucault PendulumThis photograph shows the Foucault Pendulum in the Great Hall of Pittsburgh's original Buhl Planetarium and Institute of Popular Science, in the mid-1950s. In the p... |
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2016: 75th Year of Pittsburgh's Buhl Planetarium Observatory

gaw
Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://friendsofthezeiss.org >
Electronic Mail - < [log in to unmask] >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >

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