re: My chart didn't look anything like what I typed in. Let me try that again.
I give up. It is not taking my spaces.
Anyway, I would like to see all the worlds on a graph.
On the left side, group by a worlds composition/density. Dense, metal rich worlds would be at the top. Rocky world further down, followed by less dense icy and gaseous worlds.
On the bottom, group by size. Small on the left, medium in the middle and large on the right.