Answer: Through Physics
Step-by-step explanation:
He changed the world of science through laser physics, he had a phD in science.
What he really did was amazing where he focused on such tasks as the development of lasers for isotope separation and conducted research on electro-optic modulation for satellite space communications.
He was also a astronaut for the 1986 space module Challenger. Sadly, Challenger exploded due a malfunctioning in the tank, it overheated and killed the entire crew along with Mr.Ronald.
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