Data model for a planetary system. It holds all the information necessary to generate and render a planetary system.
For example the Earth-Moon system is a planetary system, with the ISS orbiting the Earth.
Saturn and its satellites are another planetary system, with many satellites and no space stations (yet!).
The planets of the planetary system.
Usually, there is only one planet in the planetary system.
However, binary planets are possible, like Pluto and Charon
Data model for a planetary system. It holds all the information necessary to generate and render a planetary system. For example the Earth-Moon system is a planetary system, with the ISS orbiting the Earth. Saturn and its satellites are another planetary system, with many satellites and no space stations (yet!).