<prompt> Zvinhu zvinonzi metallicity muVegas photosphere inenge 32 chete yezvinhu zvinorema zviri muzuva. Enzanisa izvi, semuenzaniso, kune katatu kuwanda kwezvinhu zvinorema mu Sirius yakafanana nenyeredzi zvichienzaniswa nezuva. Kuenzanisa, zuva rine huwandu hwezvinhu zvinorema kupfuura helium yeZSol 0.0172 0.002. Saka, maererano nehuwandu, ingangoita 0.54 yeVega inoumbwa nezvinhu zvinorema kupfuura helium. Mubvunzo: Chii chinonzi zvinhu zvine nhamba yepamusoro yeatomu kupfuura helium?  <response>: simbi 