Dome

"These round rooms are called domes. We observe galaxies from domes such as these."

- Rosalina

The Domes are rooms in Super Mario Galaxy located on the Comet Observatory. These are where Mario can transport himself to other galaxies. After Mario collects Power Stars, more galaxies appear. Using a Luma which turns into a Pull Star Mario can view galaxies and then using a Launch Star he can fly to them. The majority of the domes have five galaxies, with the exception of the final one, the Garden, which only has four.