Designed by an experienced amateur astronomer and in use for 10 years, the Portable Solar System Model (PSSM) is the perfect aid for the teacher in class or the presenter with an audience. Every astronomy club will benefit from owning a PSSM.
The PSSM overcomes the mental gymnasitics of standing on an apparently flat, level ground and having to relate to conventional maps where North is UP and to space where there is no UP. The PSSM can be rotated and tilted to allow students to grasp the relationship between their fixed 'Up-Down' local vantage point and the relative orientations in the real, wide world.
