Abstract
AbstractThe first discovery of the space age was in the field of space physics and occurred with the Explorer 1 launch in 1958 and its observations of the radiation belts encircling Earth. Space physics remained a young science into 1981 when I started graduate school, so young that there were no comprehensive textbooks on the subject. It evolved quickly with missions such as Voyager, Interplanetary Monitoring Platform‐8, Hawkeye, Active‐Magnetospheric‐Particle‐Tracer‐Experiment, and ISEE in the early years. The International Solar Terrestrial Physics mission focused part of solar and space physics into Sun‐Earth‐Connections (SECs) to understand the chain of events in the Sun‐Earth system. Heliophysics was an extension and evolution of SEC, combining all of solar and space physics, maturing the whole and the individual parts into an established science.
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