Cannonballs are obstacles/enemies that appear in Super Mario Galaxy and New Super Mario Bros. Wii. They are heavy metal spheres shot from Cannons at high speeds. In Super Mario Galaxy, Cannonballs are blue with a white line around their center and two yellow circles on opposite sides. Cannonballs are fired from Cannons mainly in the Battlerock Galaxy and Dreadnought Galaxy. Cannonballs explode on impact with Mario or Luigi (or something else), making Mario/Luigi lose a wedge of health (take damage. They will hit Mario (or Luigi) and knock him down, which can make them fall off a platform or land into a Black Hole. If a Star Bit is shot at a Cannonball via the Star Cursor, the Cannonball may explode into a Coin or sometimes nothing. In New Super Mario Bros. Wii, Cannonballs are solid black and only appear in World 8's Airship level. The Giant Cannonballs also appear in this level. Cannonballs can be taken out by jumping on them. Since they always come in groups, there is a high chance for the player to earn endless 1-Ups by jumping on each Cannonball consecutively without touching the ground.