Build Your Planet

Pick your Density (g/cm³)

What will your planet be made of? Lots of dense metals like iron? Or lighter rocks like silicate?

Density is defined as p = m/V (mass / Volume), meaning the amount of mass you have in a given space. For reference, the density of iron is 7.8 g/cm3 while the density of silicate rock is between 2.0 and 4.5 g/cm3 (depending on structure).

Pick your Radius (km)

How big will your planet be? Do you want to build a small planet like Mercury or something much larger?

The radius of a sphere is the distance from the centre to the edge. Chang- ing the radius will change how big the sphere is, which will also affect the volume of your planet.

This combination of density and radius determines the volume and struc- ture of the planet you are designing. It will a ect things like how hot is the planet, what will the surface look like, how will the planet's internal dynam- ics behave? Think about these questions as you select values and proceed to generate your own planet.

Select options from the drop down menus above and see what type of planet you create!