FTP, identify these two zones of ionized particles, named for the man who discovered them by sending a Geiger counter on the space missions.
Pioneer 3, Explorer 4, and Explorer 1 all provided data that led to their discovery. The observation of helium ions in addition to protons suggests that the outer one is partly derived from solar wind, while the protons in the inner one are thought to originate from the decay of neutrons. FTP, identify these two zones of ionized particles, named for the man who discovered them by sending a Geiger counter on the space missions.
Pioneer 3, Explorer 4, and Explorer 1 all provided data that led to their discovery.
Van Allen belts