Emphasis Preaching Journal

The 1981 publication by Philip Kopper, Volunteer! O Volunteer! A Salute to the Smithsonian's Unpaid Legions, documented Moonwatch, the activity of one of the largest gatherings of volunteers ever assembled by the Smithsonian. For almost two decades, 5,000 volunteer amateur astronomers from around the world -- doctors, engineers, clergymen, factory hands, and grade school, high school, and college students -- logged 400,000 observations of space vehicles orbiting the earth, providing valuable data about satellite tracking.