Talk:Monster Girl Encyclopedia world/@comment-28856683-20160503231155/@comment-29602226-20190719004414

KC also wrote that the world of the MGE is way bigger than our Earth.

I proposed (in another forum) two ways this could be achieved:

1.''-" It is possible to have a planet bigger than Earth with a similar gravity. To start with, the planet could have a lower density due to the materials it is made of.... Quoting Wikipedia (so there could be mistakes): "The Earth's core accounts for 15% of Earth's volume but more than 30% of the mass, the mantle for 84% of the volume and close to 70% of the mass, while the crust accounts for less than 1% of the mass. About 90% of the mass of the Earth is composed of the iron–nickel alloy (95% iron) in the core (30%), and the silicon dioxides (c. 33%) and magnesium oxide (c. 27%) in the mantle and crust."''

''So, make the core less massive, and done. Earth's core is a big ball of iron and nickel... replace it with something lighter...''

If the core is less massive, its attractive force of the materials around it is less powerful too, so the mantle is less dense in turn.

''And if the planet is less dense, the distance from the crust to the geometric center of the globe is greater than that of a planet with similar mass but higher density, which means the force of gravity is lower... For example, Uranus's mass is around 14.5 times that of Earth, but its surface gravity is actually a bit lower, due to its lower density and waaaay greater radius...''

'I have checked the numbers. You could have a planet with the density of Mars, the same gravity as Earth, a radius 166,67 % that of Earth, and a surface 277,78 % that of Earth. Add less oceans and more continents... for example, if both hemispheres had as much dry land as Earth's Northern Hemisphere (wouldn't cause much problems is the dry land is split into smaller and narrower continents), you would end with an inhabitable dry surface 373,89 % times that of Earth."'

2.-The world of MGE could be not a planet as we know it, but a huge Spirit Realms created by the gods. The world itself could be a disc like Terry Pratchett's Discworld or the Exalted RPG's Creation, or maybe something even weirder...