The smallest projector type is Goto EX-3 (image). Its star sphere is stored in a bowl to cover the lights below the horizon. About 1000 stars are projected using the pinhole technique. They make up the most common 26 constellations of the Northern hemisphere. The sun, the moon and the planets are small mirrors to be placed manually at their position. The latitude can be altered but has to be fixed at the chosen position. The diurnal motor drives one rotation in 3 minutes. A little pointer is connected to the device. The total weight is 15 kg. The newer version of it is named "Nex".