|Instructions for the construction of an Orrery which demonstrates all the known objects in our Solar System larger than 250km diameter. It consists of seven units, each of which can be built as a standalone model, and all units can be interconnected with periods of motion related within an accuracy of 1%. There are 40 pages of instructions, pictures, diagrams and tables describing the instructons.Please note these Model Plans are designed by individual Meccano modellers and may use parts not currently available. The level of instruction detail is dependent on the original modeller and varies from plan to plan. These are instructions only.