Delving into the critical role of psychology in space exploration. It outlines eight segments covering the psychological challenges faced by astronauts, from rigorous training that builds strong crew bonds to the unique mental health issues of isolation and confinement in space. We also explores techniques for psychological resilience, the physical factors impacting mental well-being (sleep, exercise, nutrition), the complexities of readjusting to Earth life post-mission, and the future of space psychology in preparing for long-duration missions like Mars.