Final answer:
The main propulsion system (MPS) fuel transfer ejector is responsible for moving fuel from the auxiliary tanks to the main tanks on a space shuttle.
Step-by-step explanation:
The ejector that moves fuel from the auxiliary tanks to the main tanks is called the main propulsion system (MPS) fuel transfer ejector.
On a space shuttle, the liquid hydrogen and liquid oxygen used in the main engines are stored in two compartments in the large tank before launch. The MPS fuel transfer ejector is responsible for transferring fuel from the auxiliary tanks to these main tanks.
It is important for the fuel to be efficiently moved to the main tanks to ensure a successful launch and operation of the main engines during the space mission.