She changed how the world stays connected in space. #womeninstem #aerospace #history Before her famous thruster, Yvonne Brill had already reshaped rocketry. In the 1940s at Douglas Aircraft, she was often the only woman analyzing propellant data, developing the thermodynamic calculations that future engineers would rely on. She later contributed to Project RAND and worked on the first weather satellite, TIROS. Beyond her technical genius, she spent decades advocating for safety standards at NASA