Complex sentence: Sir William Hayward Pickering ONZ KBE (December 24,1910--March 15,2004) headed Pasadena, California's Jet Propulsion Laboratory (JPL) for 22 years, retiring in 1976, he was a senior NASA luminary and pioneered the exploration of space.
Split into simpler sentences: Sir William Hayward Pickering ONZ KBE (December 24,1910--March 15,2004) headed Pasadena, California's Jet Propulsion Laboratory (JPL) for 22 years, retiring in 1976. He was a senior NASA luminary and pioneered the exploration of space.