 Developers Wesley Huntress and Charles Kohlhase were both employees  of NASAs Jet Propulsion Laboratory and made the game in their spare  time. Huntress was a senior research scientist at JPL (who later  went on to become NASAs Associate Administrator for Space Science  was responsible for the nations planetary exploration program from  1990 to 1998). Kohlhase was the Voyager space probe Mission  Designer.