Galaxy (Super Mario Galaxy)

Grand Star Rescue (Grand Star)
'''The Gateway Galaxy is one of the many galaxies from Super Mario Galaxy for the Wii. It serves as the opening level for the game. This is the first galaxy that is visited in the game, and after Mario clears the first level in the galaxy, he won't be able to return here until he unlocks the Gate later on in the game. In the background (like Bowser's Star Reactor later on in the game), there are inaccessible Airships. If the player uses a flight hack and flies towards the ships, he or she will find the Airships are solid, but have no gravity. However, the camera is very glitchy while Mario or Luigi stands on the ships. '''

Gateway's Purple Coins (Red Power Star)
This mission is only made accessible after the Garden has been unlocked on the Comet Observatory. When Mario enters the galaxy, Rosalina will greet him. A Red Luma notices how much Rosalina trusts Mario, so he gives Mario the challenge of collecting 100 Purple Coins which he has scattered around the planet to earn his trust as well. There are seventy coins located on the planet itself and thirty coins in the air. Mario must use the new Red Star power-up that gives him the ability of flight to reach the thirty Purple Coins floating in the air. Successful completion of this mission will award Mario the game's sole Red Power Star, and also allow him to use the Red Star power-up in the Comet Observatory whenever he wants.