File:Terrace.jpg
The Terrace.
File:Terracesystem.jpg
How the room appears after Mario grasps the Beam Star.
The Domes are rooms in Super Mario Galaxy located in the Comet Observatory. This where Mario can transport himself to other galaxies. After Mario collects Power Stars, more galaxies appear. The known Domes are the Terrace, Kitchen, Fountain, Garage and the Engine Room.