|First Appearance||Unknown Mario Game|
The Cosmic Lighthouse, while stated to be a asteroid, doesn't really resemble one so much as it does a couple of upside down spires with a lighthouse on it, the beam being either white or red and constantly looking around of it's own will. The Lighthouse has a much bigger interior than the outside would imply. The lighthouse has stained glass windows, resembling stars and planets.
The Cosmic Lighthouse is powered by a single, lone, Red Power Star. Cosmetta has no real control over the direction it goes unless it is powered by some Power Stars, similar to Rosalina's own Comet Observatory.
There is no available history available for Cosmetta's Lighthouse. Maybe there will be soon, who knows.