Katherine Johnson

Human Computer of Langley · NASA Mathematician · 1918–2020

The NASA mathematician whose hand calculations of orbital trajectories helped send the first Americans into space and to the Moon — and who insisted, against segregation, on being counted.

Who was Katherine?

Katherine Johnson was a mathematical prodigy from White Sulphur Springs, West Virginia, who finished high school at fourteen and college at eighteen. In 1953 she joined the segregated West Area Computing unit of the NACA — soon NASA — at Langley, where Black women 'computers' worked apart from white staff. Her brilliance moved her into the engineering teams: she calculated the trajectory for Alan Shepard's 1961 suborbital flight, and when John Glenn prepared to orbit the Earth in 1962, he asked that 'the girl' check by hand the numbers the electronic computer had produced — he would fly only once she confirmed them. She worked the mathematics of the Apollo Moon landings and the safe return of the crippled Apollo 13. She received the Presidential Medal of Freedom in 2015 and lived to 101.

Major achievements

• Calculated the trajectory for Alan Shepard's 1961 spaceflight, the first American in space
• Verified by hand the orbital equations for John Glenn's 1962 Friendship 7 mission at his request
• Contributed to the trajectory mathematics of Apollo 11 and the rescue of Apollo 13
• Co-authored NASA technical reports at a time when Black women were rarely credited
• Received the Presidential Medal of Freedom (2015)

Life in brief

• 1918 — Born in West Virginia: A prodigy who craved to count everything.
• 1937 — Graduates college at 18: With degrees in mathematics and French.
• 1953 — Joins the NACA: In the segregated West Area Computing unit at Langley.
• 1961 — Shepard's flight: She computes the trajectory for the first American in space.
• 1962 — Glenn's orbit: Glenn asks her to check the computer's numbers by hand.
• 1969 — Apollo 11: Her work supports the Moon landing.
• 2015 — Medal of Freedom: Honoured by the President.
• 2020 — Dies at 101: A celebrated figure of American science.

Explore the life of Katherine — five chapters

1. The Girl Who Counted Everything — West Virginia, and a family that moved for school
2. The West Area Computers — Human computers, and separate everything
3. Get the Girl to Check the Numbers — Freedom 7, Friendship 7, and a request from an astronaut
4. Apollo — Rendezvous, and a lifeboat calculation for Apollo 13
5. Recognised at Ninety-Seven — Hidden Figures, and a life of 101 years

Read the five-chapter life of Katherine Johnson →

Where Katherine appears in your course

Katherine Johnson has a genuine claim on 2 lessons of the Pearson Edexcel International GCSE science course built into Incandio:

• Forces, Vectors and Scalars — Physics: Johnson calculated the trajectories that put astronauts into orbit and brought them back to a chosen point in the ocean, by hand. In that work a velocity with the right magnitude and the wrong direction is not a small error — it is a spacecraft that never comes home, which is the most literal demonstration there is of why a vector is not just a number.
• Momentum — Physics: Spaceflight is momentum arithmetic and nothing else: a rocket gains momentum only by throwing mass backwards, a capsule changes orbit only by changing its momentum, and a re-entry is the controlled destruction of an enormous quantity of it. Johnson calculated those trajectories by hand at NASA, and when the electronic computers produced the numbers for John Glenn's flight he asked for her to check them before he would fly. She is the person on this page who knows what it means for the calculation to be the safety feature.

Debate Katherine in the Agora

Reading is the start. On Incandio an idea counts as mastered only once you have argued it against the person with the strongest claim on it, in structured rounds marked against published descriptors.

• How Do You Know It's Right — “If you have followed the method correctly, the answer is right.”

Teach what Katherine discovered

From Gravity to Spaceflight — ideas Katherine is tied to on the Living Knowledge Map. On Incandio you prove you understand one by teaching it to Ember, the AI pupil, in Teach the Room.

Begin

• Start a conversation with Katherine — a dramatised, historically grounded AI portrayal
• Read the Historical Brief
• Explore the life of Katherine — five chapters
• Find your exam topics · Meet all 208 figures