Galileo Galilei, “Dialogue of the Two Chief World Systems”, 1632 was a nonfiction science book on astronomy. Modern science fiction is centered on the science of astronomy. Nonfiction astronomy books all cite Galileo Galilei, “Dialogue of the Two Chief World Systems”, 1632 as proof of the Nicolaus Copernicus “heliocentric, solar-system” of 1543. The invention of the “telescope”, and its use as proof by Galileo proved to be historic. Science Fiction today is often characterized as “invention” driven stories. The telescope, the microscope, the steam engine…etcetera, nonfiction Science is an invention driven story.