Planets

Planets
Many planets in infinity vary by the extremes, some are even flat or hover over other planets, like The 3 worlds. Most planets have a crystal core and depending on the power output of the core, depends on the size. (for example, the planet underneath The 3 worlds that planet is extremely large and has the strongest power output and the largest sized crystal core.)

Planetary Workings
Planets work very differently compared to real life. Because of the vast size difference in planets, the stars are usually completely out of wack. (some stars orbit around planets, others times they don't even have stars at all and some stars are completely incased in a shell that is hollow on the inside.)