Components in this compound:

plini

x₁ is a planet revolving around x₂ with planetary characteristics x₃, orbital parameters x₄.

midju

x₁ is in/at the middle/center/midpoint/[is a focus] of x₂; (adjective:) x₁ is central.

senta

x₁ is a layer/stratum [shape/form] of x₂ [material] within structure/continuum/composite x₃.