The Solar System on a large folded poster from Hallwag showing the orbits of the planets & major comets, with the whole of the reverse side presenting notes, diagrams, tables, photos, etc, on various aspects of the solar system, space explorations, etc. On one side is a poster of the solar system, including the poor now-downgraded Pluto, showing the situation as on was in early 1970s. Colours indicate orbits of planets & comets, & each planet is shown with the orbits of its moons. A drawing shows the sizes of the planets relative to the size of the sun. The legend & a scale line in the margin provide more relevant information. The whole of the reverse side is covered by various diagrams, tables & photos: the history of our understanding of the solar system, facts & figures on each planet, the comets, space exploration with a table of main probes until 1978, etc.