$ Katherine Johnson
1918–2020
 Mathematician at NASA
 Orbital mechanics expert whose analytical work enabled Project Mercury, Apollo, and Shuttle missions; renowned for precision and verification rigor.
 orbital mechanicsNASAMercuryApolloShuttle 
 $ contributions
- Computed launch windows, trajectories, and re‑entry parameters for Project Mercury (including Friendship 7)
 - Independently verified IBM computer results by hand for John Glenn’s orbital flight prior to launch
 - Contributed lunar trajectory and return‑to‑Earth calculations supporting Apollo 11 and later missions
 - Worked on Space Shuttle and Earth resources satellite (ERTS/Landsat) programs; authored/co‑authored 26 technical papers
 - Advanced analytical methods for orbital rendezvous and error analysis under tight real‑time constraints
 
$ awards
- Presidential Medal of Freedom (2015)
 - Congressional Gold Medal (2019)
 - NASA Group Achievement and Special Achievement recognitions
 
“Like what you do, and then you will do your best.”