When I was a child we would visit the Griffith Observatory from time to time. I was always fascinated by the Foucault Pendulum
I still am. I am not alone, it is a magnet for most who enter the observatory.
As the pendulum moves back and forth, the earth is turning beneath it. About every 8 minutes the earth has rotated enough that a pin on the bottom of the pendulum knocks over another of the tiles at the left.
The shiny ball of the pendulum reflects the newly restored Hugo Ballin Murals in the dome of the rotunda.
Find more reflections at Weekend Reflections, hosted for us by James.