On this date in 1973, the United States made aeronautical history. “Skylab,” the first orbiting space station, was launched unmanned into the atmosphere by a modified Saturn V rocket. Between 1973 and 1974, three crews visited the station in order to conduct scientific experiments, many of which provided NASA with incredible information. For one, the studies were able to confirm the existence of coronal holes (or areas where the corona is darker, colder and contains lower....