What do astronauts do on a space shuttle?

Answer 1

Whatever the mission calls for. Sometimes it's launching a satellite, sometimes retrieving one for repair. Much of their time is spent conducting scientific experiments that can benefit from the microgravity environment,

Answer 2

Astronauts on a space shuttle conduct experiments, perform repairs on the spacecraft, assist with docking and undocking procedures, and monitor systems to ensure the safety of the mission. They also conduct spacewalks when needed to perform maintenance or repairs on the exterior of the shuttle or the International Space Station.