Poldark has three series.
A planetary mnemonic refers to a phrase used to remember the planets and dwarf planets of the Solar System , with the order of words corresponding to increasing sidereal periods of the bodies .. Solar System. Solar System. sidereal periods. orbital period. One simple visual mnemonic is to hold out both hands side-by-side with fingers spread and thumbs in the same direction , with the fingers of one hand representing the terrestrial planets , and the other hand the gas giants .. terrestrial planets. terrestrial planets. gas giants. gas giants. The first thumb represents the Sun and asteroid belt , including Ceres , and the second thumb represents the asteroid belt and trans-Neptunian objects , including Pluto .. Sun. Sun. asteroid belt. asteroid belt. Ceres. Ceres ( dwarf planet ). Pluto. Pluto