[@Gisk] Seeing Pink Diamond in the mural only holding up Earth, which has only one dot by it, I would infer that the small dots placed by larger circles are supposed to be that planet's moons. As well, you can actually see what [i]kind[/i] of planet the diamonds captured. The size of the circles, as well as the lines crossing through a few of them, could very well indicate their actual size compared to other celestial bodies and if they have rings (like Uranus or Saturn). The lines could also represent a planet's axis.