MarioWiki:Sandbox

Galaxies
All forty-nine Galaxies can be accessed via the Grand World Map by piloting Starship Mario through the different worlds and galaxies. There are seven more galaxies in this game than in the first game. Galaxies marked with an asterisk (*) are only accessible by feeding a Hungry Luma. Unlike the first game, which had numerous galaxies consisting of only a single mission, each galaxy in Super Mario Galaxy 2 has two to three unique missions; with many of the smaller galaxies possessing a Prankster Comet level or a hidden mission. Additionally, each galaxy has a number of Green Stars, the amount of which is equal to the amount of Power Stars in the galaxy.