Imperfectly Perfect-Sphered Planets

Although the roundness of the planets is not perfect, every planet belongs in its own spherical category, like the Earth is an "oblate spheroid."

Due to the differences in the planet's sizes, bigger planets such as Saturn may gather extra mass around its middle area and get thicker.

The idea of a cube-shaped moon is not entirely impossible. However, for it to happen, it will take a much longer time before we are able to see one.

Asteroids and moons are generally smaller than planets therefore it goes to show that they both have lesser gravity...