World 2 (Super Mario Galaxy 2)

"Wow. Take a look at that! We found an entirely new world! Looks like there should be plenty of Power Stars here."

- Lubba

World 2: Shooting Through the Stars is the second world featured in Super Mario Galaxy 2. It is located near a solar system different from Mario's, however, a very similar solar system was seen for a second during the ending of Super Mario Galaxy. In this world, there are many different galaxies, the last of which, Bowser's Lava Lair, features the first encounter with Bowser.

Trivia

 * The music played on this world's map is identical to World 1's music, until World 1's music is changed after green Prankster Comets appear later in the game.
 * The background of this world looks identical to the real life Milky Way Galaxy, though some of the planets are in the wrong orbits.