Katherine Johnson: The NASA Mathematician Who Launched a Nation 🚀 Before NASA had computers, they had Katherine Johnson — a Black woman whose brilliant mind helped put John Glenn into orbit and brought him safely back. She calculated the trajectory for the first American spaceflight, all while breaking barriers of race, gender, and science. When the mission mattered most, even the astronauts said: 👉 “Get the girl to check the numbers.” That girl changed history. #KatherineJohnson #NASA #BlackH