Evolution of the planet’s core, planetesimals capture, and total radii as function of time (left panel) and core mass (right panel) for the second outermost planet of Fig. 4. In the right panel, we also include two time indicators at 10⁵ and 10⁶ yr with dashedvertical lines. The upper-right portion of the plot for the total radius in the left panel is also shown on the left panel of Fig. 7.