 At times, the precise observations and calculations of dedicated skywatchers surpasses the work of professionals.One of the most notable activities of Moonwatchers after the IGY was the observance of Sputnik 4 when it reentered the atmosphere in September 1962.Moonwatchers and other amateur scientists near Milwaukee, Wisconsin observed the flaming re-entry and their observations eventually led to the recovery and analysis of several fragments from the Soviet satellite.