Nzira yakajairika yekuberekwa kwenyeredzi ndeyekudonha kwegiravhiti yegore rinotonhora remagasi uye guruva. Sezvo gore rinoputika rinopisa nekuda kweKelvin<unk>Helmholtz mechanism. Pakutanga mukuita gasi rinoputika rinokurumidza kupisa simba rakawanda, zvichibvumira kudonha kuenderera mberi. Pakupedzisira, nzvimbo yepakati inova yakasimba zvakakwana kubata radiation. Naizvozvo, tembiricha yepakati uye kuwanda kwegore rakadonha zvinowedzera zvakanyanya nekufamba kwenguva, zvichideredza kudonha, kudzamara mamiriro acho apisa uye akaomarara zvakakwana kuti zviitiko zve thermonuclear zviitike mumoyo weprotostar. Kune nyeredzi zhinji, gasi uye kumanikidza kwemwaranzi inogadzirwa ne thermonuclear fusion reaction mukati medumbu renyeredzi kunotsigira chero kudonha kwegiravhiti.
nharaunda yepakati inova yakasimba zvakakwana kuti itore mwaranzi