Chu'unthor is a ship that flies around in the galaxy, carrying a mobile jedi academy. Yoda is one of the teachers aboard the ship and naturally the ship is also home to a whole bunch of technicians, cooks, service people and so on.
An Aquatic planet that is the sole provider of Kolto, a highly valued healing substance used before Bacta was discovered. There is only one surface city on Manaan, and the real "surface" of the planet can only be accessed in Submersibles. The native species live in deep caves below the surface.