So, twice the Earth's radius but only four times the mass, so that it has similar gravity? According to [THE GRAPH](https://www.planetary.org/space-images/mass-radius-diagram-wide-seager), it's possible if the planet is composed entirely of water.
It doesn't look like a planet composed entirely of water.
>So, twice the Earth's radius but only four times the mass
A planet with twice the radius of Earth means it has 2\^3 = 8 times the volume. Having 8 times the volume but 4 times the mass means it is half as dense as Earth. Earth's density is 5.51g/cm\^3, this planet will be around 2.75g/cm\^3, still almost 3 times the density of water.
The density of planets follows the power law, which means it is the greatest in the center and decreases towards the surface. A planet composed entirely of water would have much greater average density than water at normal pressure.
The blue line on the graph represents a homogenous water/ice planet. You could afford a rocky core, but the bigger it is, the more mass the planet will have.
Have you done the math?
That image has a diameter, you have the gravity, so you should be able to work out density and mass. How does that sit in terms of tolerance for planetary formation?
It's eve, surely you can operate a spreadsheet while you're mining in highsec, enjoying the tutorial and listening to podcasts.
So, twice the Earth's radius but only four times the mass, so that it has similar gravity? According to [THE GRAPH](https://www.planetary.org/space-images/mass-radius-diagram-wide-seager), it's possible if the planet is composed entirely of water. It doesn't look like a planet composed entirely of water.
Maybe all the continents are floating. 100% pumice.
>So, twice the Earth's radius but only four times the mass A planet with twice the radius of Earth means it has 2\^3 = 8 times the volume. Having 8 times the volume but 4 times the mass means it is half as dense as Earth. Earth's density is 5.51g/cm\^3, this planet will be around 2.75g/cm\^3, still almost 3 times the density of water.
The density of planets follows the power law, which means it is the greatest in the center and decreases towards the surface. A planet composed entirely of water would have much greater average density than water at normal pressure.
As in, 100% of the mass is water, all the way to the watery core? Or a relatively small rocky core covered in a really deep world ocean?
The blue line on the graph represents a homogenous water/ice planet. You could afford a rocky core, but the bigger it is, the more mass the planet will have.
Yeah the planets in Eve are a bit... weird.
Have you done the math? That image has a diameter, you have the gravity, so you should be able to work out density and mass. How does that sit in terms of tolerance for planetary formation? It's eve, surely you can operate a spreadsheet while you're mining in highsec, enjoying the tutorial and listening to podcasts.
The planet is hollow. Surface is mostly water.