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Katherine Johnson, NASA legend and 'Hidden Figure,' dies at 101

The brilliant research mathematician helped change the face of NASA.

Katherine Johnson received the Presidential Medal of Freedom from President Barack Obama in 2015.

NASA/Bill Ingalls

Katherine Johnson, who died Monday at 101, is remembered as a "NASA mathematician, trailblazer in the quest for racial equality, contributor to our nation's first triumphs in human spaceflight and champion of STEM education."

NASA Administrator Jim Bridenstine shared the news of her passing. "She was an American hero and her pioneering legacy will never be forgotten," Bridenstine wrote. 

As a "human computer," Johnson famously double-checked the numbers for astronaut John Glenn's 1962 orbital mission. Glenn himself asked for Johnson to re-run the computer calculations prior to his launch. This came at a pivotal moment in the space race between the US and the Soviet Union. Glenn became the first American to orbit the Earth.

Katherine Johnson's work at NASA's Langley Research Center spanned 1953 to 1986 and included trajectory calculations that helped make early space launches successful.

NASA

She received the Presidential Medal of Freedom in 2015. 

Johnson's work and legacy came into sharper focus for many in the 2016 book Hidden Figures: The American Dream and the Untold Story of the Black Women Who Helped Win the Space Race. The nonfiction book was adapted into the 2016 movie Hidden Figures.

"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," NASA says in a biography of Johnson.

NASA quoted Johnson in a statement issued at the time of the Presidential Medal of Freedom honor: "I counted everything. I counted the steps to the road, the steps up to church, the number of dishes and silverware I washed … anything that could be counted, I did." 

Johnson's life counted, immeasurably.