This is the main and only planet of the galaxy, and is where other Mario games take place. This game (Super Mario Galaxy) only shows Peach's Castle and Toad Town however. The castle and area is based off its look from Super Mario 64. The area contains an enormous lake with a river flowing into it and a pathway to Toad Town. The path goes through the town, and into the Castle. There is an invisible wall blocking the entrance to Peach's Castle just like in Super Mario 64.
The Star FestivalThe Star Festival is the only level of the Grand Finale Galaxy. It requires the player all 100 Purple Coins. After collecting all 100 Purple Coins, Mario/Luigi will receive the 121st Power Star. However, before collecting the Star, Mario/Luigi must talk to Mailtoad to receive a congratulatory message and attached picture on the Wii's Message Board. This mission is named after the event at the beginning of the game, which occurs every 100 years.
- Although Peach's Castle can be seen, an invisble wall blocks the entrance of the Castle, probably because the Peach's Castle area has not been designed and closed off from the player (like an unfinished building being constructed).
- This is the only galaxy where it is impossible to die. Nope, no Black Holes at all.