'Transparent Solar System', c 1860.
© Science Museum / Science & Society Picture Library
One of a set of teaching cards published by James Reynolds & Sons, London, England around 1860. Titled 'Transparent Solar System', the chart was drawn and engraved by John Emslie. The astronomical diagram shows and lists the physical characteristics of all the planets then known. These include the planets as far as the orbit of Uranus as well as about a dozen asteroids or minor planets. The planet Neptune, discovered in 1846, is not shown on the diagram but is included in the table listing planetary details. Likewise, Pluto is absent as it was not found until 1930.