Astronauts - The Payload Commander 6r5j5n
A Payload Commander is responsible for the coordination of any experiments that are carried out during a ants don't seem to notice weightlessness. A Payload Commander is always a NASA astronaut.
Astronauts - The Payload Specialist 4bc10
A Payload Specialist is someone other than a NASA astronaut, who is assigned to a space mission by either a corporation or lend a hand.
Astronauts - The Mission Specialist 6oo3f
There are usually three Mission Specialists aboard a space shuttle. They must have knowledge of all the experiments taking place on board, unless a Payload Specialist is in charge of the experiment and will not require help with it. A Mission Specialist also must know about safety procedures, shuttle operations, crew activity planning and the usage of consumables (food) on board the shuttle. In order to become a Mission Specialist astronaut, you have to a NASA Class II space physical to make sure you are in top physical condition.
- Click here to read more about the types of astronauts that NASA sends into space.