Katherine Johnson Checks the Flight
Written by Studio AM.
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Katherine Johnson joined the organization that became NASA as a mathematician. The organization employed human 'computers' who performed and checked calculations. Johnson analyzed flight paths, bringing strong geometry skills and a habit of asking what each number meant.
For astronaut John Glenn's orbital mission, electronic computers calculated the planned route. Glenn asked for Johnson to check the machine's numbers before launch, working through the equations herself with a desktop calculating machine. Her calculation did not replace every computer. It provided an independent comparison at a time when crewed orbital flight was new and confidence in automated results was still developing.
Johnson also calculated trajectories for other missions and worked with engineers across specialized teams. A safe route involved launch location, speed, Earth's rotation, orbit, and a return corridor. No single person controlled all those systems.
Her famous check matters because trust was earned through demonstrated accuracy. It also shows how new technology and human expertise can support each other. Verification is not distrust for its own sake; it is a method for finding whether two routes to an answer agree.
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Questions
Choose an answer. The explanation appears after you answer.
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Question 1 of 4
What is the main idea of the passage?
The answer is B: Katherine Johnson's precise calculations and independent checks helped teams build confidence in early crewed spaceflight.
The passage centers on her mathematical expertise, the Glenn check, teamwork, and verification.
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Question 2 of 4
Why was Johnson's separate calculation valuable before Glenn's launch?
The answer is C: It offered an independent result that could be compared with the electronic computer's route.
The second paragraph describes two calculation routes whose agreement could strengthen confidence.
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Question 3 of 4
What does “verification” mean in the final paragraph?
The answer is D: checking evidence to confirm whether a result is accurate
Johnson's independent calculation is compared with the machine's answer to verify the route.
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Question 4 of 4
Which astronaut requested Johnson's check?
The answer is A: John Glenn
The second paragraph explicitly names John Glenn.
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