Juno I rocket using Hydyne, developed by Mary Sherman Morgan, launched Explorer 1.
On January 31, 1958, the Explorer 1 satellite was launched into space from Cape Canaveral. Crucially, this mission succeeded with the help of Hydyne, a liquid propellant engineered by Mary Sherman Morgan. Although not publicly credited at the time, her work was vital, ensuring the Juno I rocket attained the necessary velocity to enter orbit. This event marked a milestone for the American space program, representing the first successful U.S. satellite launch amid the heated space race with the Soviet Union. Her work demonstrated significant technological innovation and paved the way for future achievements in the exploration of space.