The Terrace is the first dome appear in Super Mario Galaxy. It can be unlocked after the Grand Star from the Gateway Galaxy has been retrieved. It is to the left of the main platform and in front of the Fountain. The main boss is Megaleg.
It's exterior is covered completely with grass giving the appearance that it is part of the ground.
The interior has a wallpaper depicting the silhouette of a castle with a starry sky. On the right there is a telescope. Mario can not use it and it may be the same one from Rosalina's Storybook.
- Good Egg Galaxy
- Honeyhive Galaxy
- Loopdeeloop Galaxy
- Flipswitch Galaxy
- Bowser Jr.'s Robot Reactor
- Sweet Sweet Galaxy (400 Star Bits to Hungry Luma)