Super Mario Galaxy/Honeyhive Galaxy

Honeyhive Galaxy is accessible from the Terrace observation dome. You need 3 Stars to enter.

Star 3: Big Bad Bugaboom
Boss fight.

Star 4 (Cosmic Comet): Honeyhive Cosmic Mario Race
Available when a Prankster Comet is in this Galaxy. Race a mirror of yourself to reach the Star.

Did you find?

 * 1-Up Mushroom to the left of the start, near the sign (except during Star 4).
 * 1-Up Mushroom high on a pink flower when Bee Mario.
 * Star Bits in the form of a letter M in the sky behind you at the start.