Edward Purdy Ney (October 28, 1920 – July 9, 1996) was an American physicist who made major contributions to cosmic ray research, atmospheric physics, heliophysics, and infrared astronomy. He was a discoverer of cosmic ray heavy nuclei and of solar proton events. He pioneered the use of high-altitude balloons for scientific investigations and helped to develop procedures and equipment that underlie modern scientific ballooning. He was one of the first researchers to put experiments aboard spacecraft.