[Albert Einstein with the Staff of Yerkes Observatory]

After Albert Einstein (1879-1955) published his theory of relativity, a number of observatories attempted to prove the theory based on Einstein’s calculations which predicted the gravitational bending of light passing a large body such as the Sun. Einstein visited a number of observatories which attempted to prove the theory. This photograph with the staff of the Yerkes Observatory was taken in 1921, the same year he won the Nobel Prize in Physics.