Analysis of information sources in references of the Wikipedia article "Κάθριν Τζόνσον" in Greek language version.
Her calculations proved as critical to the success of the Apollo Moon landing program and the start of the Space Shuttle program, as they did to those first steps on the country's journey into space.
As a part of the preflight checklist, Glenn asked engineers to 'get the girl'—Katherine Johnson—to run the same numbers through the same equations that had been programmed into the computer, but by hand, on her desktop mechanical calculating machine. ... When asked to name her greatest contribution to space exploration, Katherine Johnson talks about the calculations that helped synch Project Apollo's Lunar Lander with the moon-orbiting Command and Service Module.
