Rughwerug

Rughwerug is the largest planet in the Whar did i maek!!!!!!!!!verse. It is infinite sized, being the third largest planet ever discovered.

Composition
It is made of Metrium, carbon dioxide and hydrogen. The crust is x-ray allowing you to see right through it.

Mantle
The Mantle is a very thick material.

Core
It is made of solid hydrogen, so it is very cold. There are some gems inside the core.