Konstantin Tsiolkovsky was a pioneering Russian rocket scientist and cosmonautics theorist, shaping future space exploration.
John Glenn was an American astronaut, aviator, and politician, famously known for being the first American to orbit the Earth and later serving as a U.S. Senator.
Gherman Titov was a Soviet cosmonaut who made history as the second person to orbit the Earth and the first to spend an entire day in space.
Alexey Leonov was a Soviet cosmonaut who became the first human to conduct a spacewalk, showcasing bravery and pioneering spirit.