Sketches of Uranus’s interior structure. The left side of each panel shows the composition, and the right side illustrates the temperature. Cold regions are colored in blue, hot regions in yellow. The protosolar H–He mixture is colored in light blue, water in dark blue, rock in orange, and iron (bottom panel) in gray. Composition gradients are illustrated by a color gradient of the two mixed materials. The dashed curve marks the boundary between the convective and non-convective regions. Mass fractions of water, rock, and iron are indicated with Z_w, Z_r, and Z_Fe. The subscript “c” stands for “central” and “cb” for “core boundary.” Panel (i) represents Uranus with P_v, while panel (ii) corresponds to Uranus with P_H. Panels (iii) and (iv) illustrate Uranus’s interior structure with pure rock as the heavy element, based on different rotation periods: P_v in panel (iii) or P_H in panel (iv). Panel (v) represents Uranus with a high density core.