I'm reading an article and it says
It's [sic] internal makeup is likely differentiated into several layers, with a 3,400-kilometre (2,100 mi) rocky center surrounded by layers composed of different forms of crystalized [sic] ice.
Does this mean the diameter of the "center" is 3,400 km? It's a bit ambiguous where this "center" ends. Anywhere I can find more details on Titan's interior?