Green Star

Green Power Stars are green-colored Power Stars that can be found in Super Mario Galaxy and Super Mario Galaxy 2.

In Super Mario Galaxy, there are only three Green Power Stars, each of which is hidden away in a different galaxy. Collecting all three of them grants Mario access to the three Trial Galaxies on the Planet of Trials: the Rolling Gizmo Galaxy, the Loopdeeswoop Galaxy, and the Bubble Blast Galaxy.

In Super Mario Galaxy 2, there are a total of 120 Green Power Stars to be found (also called Cosmic Jewels). These are only available once the player collects 120 regular Power Stars, and completes the first mission of Bowser's Galaxy Generator a second time. Each galaxy has the same number of Green Power Stars as regular Power Stars (except the Grandmaster Galaxy, which has no Green Stars at all). When collecting Green Stars, the player will have to redo a certain mission from a galaxy. Green Stars are usually found in hard to reach or hidden areas of the galaxies. Additionally, the Green Stars only appear when a galaxy is orbited by a Green Comet (every galaxy will have a Green Comet once they are unlocked). If you get close to one, you will hear a shimmering noise.

Super Mario Galaxy Green Power Star Locations

 * Battlerock Galaxy - Luigi under the Saucer: Rescuing Luigi from a cage in the first level.
 * Dusty Dune Galaxy - Treasure of the Pyramid: Collecting 5 Silver Stars in the Pyramid Planet.
 * Buoy Base Galaxy - The Secret of Buoy Base: Under the Buoy Base sealed in a cage.

Trivia

 * In Super Mario Galaxy, even though only three Green Power Stars are able to be recovered in the game, a total of seven Green Lumas can be found on the Comet Observatory and the Planet of Trials (counting the one that takes Mario to the Grand Finale Galaxy).
 * Green Lumas grow up to become Green Power Stars, according to Rosalina.
 * When the Green Comets are in orbit in Super Mario Galaxy 2, a remix of Good Egg Galaxy's music is played in World 1's map.