The Kelvin<unk>Helmholtz mashandiro chinhu chemuchadenga chinoitika apo pamusoro nyeredzi kana nyika inotonhorera. The kutonhora kunokonzera kumanikidzwa kudonha, uye nyeredzi kana nyika shrinks somugumisiro. compression ichi, uyewo, anodziya pakati nyeredzi / nyika. mashandiro ichi pachena musi Jupiter uye Saturn uye pamusoro shava dwarfs vane nechepakati tembiricha havasi yakakwirira zvakakwana kuti apfuure yenyukireya fusion. Zvinofungidzirwa kuti Jupiter rinobudisa simba kuburikidza mashandiro ichi pane anowana kubva kuZuva, asi Saturn angasava. The yokupedzisira muitiro anoita kuti Jupiter kuderera pamwero masendimita maviri pagore. The mashandiro akanga pakutanga aronga naKelvin uye Helmholtz mukupera kwezana remakore rechigumi nemapfumbamwe kutsanangura simba rinobva kuZuva.
Jupiter naSaturn