Astronauts are individuals who are trained to pilot spacecraft and travel to outer space for various missions, such as conducting scientific research, repairing satellites, or participating in space exploration missions. These individuals undergo rigorous training in order to prepare for the physical and mental challenges of space travel, as well as to develop the specialized skills needed to operate in a zero-gravity environment. Astronauts work closely with scientists, engineers, and mission control teams to carry out their missions and ensure their safety and success in space.