A thrilling adventure story chronicling the perilous journey of the scientists who set out to prove the theory of relativity–the results of which catapulted Albert Einstein to fame and forever changed our understanding of the universe.

In 1911, a relatively unknown physicist named Albert Einstein published his preliminary theory of gravity. But it hadn’t been tested. To do that, he needed a photograph of starlight as it passed the sun during a total solar eclipse. So began a nearly decade-long quest by seven determined astronomers from observatories in four countries, who traveled the world during five eclipses to capture the elusive sight. Over the years, they faced thunderstorms, the ravages of a world war, lost equipment, and local superstitions. Finally, in May of 1919, British expeditions to northern Brazil and the island of Principe managed to photograph the stars, confirming Einstein’s theory.