March 1928: The king of Afghanistan, Amanullah Khan walking across the lawn at Greenwich Observatory to where a small telescope is set up for him. An open observatory roof is in the background. (Photo by Fox Photos/Getty Images)
March 1928: The king of Afghanistan, Amanullah Khan walking across the lawn at Greenwich Observatory to where a small telescope is set up for him. An open observatory roof is in the background. (Photo by Fox Photos/Getty Images)