Space Shuttles are a fleet of shuttle craft carried onboard the Centauri Princess.
They are stationed within the EVA Bay in an outer deck of the starship, accessible from the Lower Province. The fleet is much more advanced than the 20th century versions operated by NASA in low earth orbit.
Space shuttles are used for sight-seeing flyaround tours around the Centauri Princess, as well as for engineering EVAs to do maintenance work on the exterior.
A fleet of four space shuttles were employed in 'Operation Energy Barrier' (chapter 9, First Ark to Alpha Centauri) at the height of the Wolf Angels syndrome to install a defensive electromagnetic shield around observation windows.