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  • What is a Planet?

    What is a Planet?

    The front of this lithograph features size comparisons of dwarf planets Eris, Pluto and Ceres. The back of the lithograph explains the definition of "planet" and how the International Astronomical Union came to classify objects as planets or dwarf planets.

  • Moons of the Solar System

    Moons of the Solar System

    The front of this lithograph features images of selected moons in the solar system with their relative sizes. The back of the lithograph has general information, significant dates, and interesting facts about the moons of Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

  • Our Solar System

    Our Solar System

    The front of this lithograph shows the planets in the correct order of distance from the sun, the correct relative sizes, and the correct relative orbital distances. Facts including the radii of the planets, the distances of the planets from the sun, and the number of known moons in the solar system are on the back of the lithograph.