Crewed missions refer to spaceflights that carry astronauts aboard a spacecraft to explore outer space. These missions are designed to conduct scientific research, test new technologies, and gather data about celestial bodies. Notable examples include the Apollo missions to the Moon and the ongoing International Space Station (ISS) missions. During crewed missions, astronauts perform various tasks, such as conducting experiments, repairing equipment, and monitoring the spacecraft's systems. Safety is a top priority, and extensive training is required for astronauts to prepare for the challenges of space travel, including microgravity and radiation exposure.