Charles P. Conrad Jr 1930 1999 . ... Credit Copyright: Courtesy NASA Explanation: Known for his sense of humor and infectious grin, Charles P. "Pete" Conrad , as commander of the Apollo 12 mission , was the third person to walk on the moon. ... Selected as a NASA astronaut in 1962, Conrad is seen here in 1965 during a suiting up activity in preparation for his first space flight - the endurance record setting Gemini 5 mission . His final space flight was to Skylab in 1973. ...