Comet observatory
The Comet Observatory is the home to Princess Rosalina and the Lumas. It plays the role of a "hub" area in Super Mario Galaxy, the only game in which it has appeared so far. From this location, Mario is able to access the many galaxies in the game via a number of smaller observatories, of which only one is initially open. Others are opened as progress is made through the game and Grand Stars are returned to the observatory.