Katherine Johnson was an American mathematician who used geometry to calculate spacecrafts' trajectories. She also worked at NASA to help determine the location and time to launch the Apollo 11 rocket to the moon, and to get the crew back safely!
Visit these sites to learn even more!
https://www.nasa.gov/content/katherine-johnson-biography
https://www.science.org/doi/10.1126/science.abc1546
https://www.katherinejohnsonfoundation.org/biography/