Dome

From the Super Mario Wiki

This article is about the rooms from Super Mario Galaxy. For information about the top of the St. Basil's Cathedral that appears in Mario is Missing!, see here.

The Domes are rooms in Super Mario Galaxy located in the Comet Observatory. These are where Mario can transport himself to other galaxies. After Mario collects Power Stars, more galaxies appear. The Terrace, Fountain and Kitchen have two main galaxies, two bonus galaxies and one boss battle galaxy. The Bedroom and Engine Room have three main galaxies, one bonus galaxy and one boss battle galaxy. The Garden has three main galaxies and one bonus galaxy. The final galaxy of each Dome is a boss battle against either Bowser or Bowser Jr. culminating in the acquisition of a Grand Star. Additionally, once a few Power Stars from the Dome are collected, a Hungry Luma will appear, providing a portal to another galaxy near the Dome.

The Areas of Super Mario Galaxy
Domes
Terrace | Fountain | Kitchen | Bedroom | Engine Room | Garden
Other Areas
Comet Observatory | Garage | Library | Trial Galaxies | Gate
Other Galaxies
Bowser's Galaxy Reactor | Gateway Galaxy | Grand Finale Galaxy