Cov huab cua stellar feem ntau yog hais txog txheej txheej ntawm lub hnub qub uas tuaj yeem pom ncaj qha. Qhov ntom ntom ntawm qhov nruab nrab ntawm cov cua yog hu ua photosphere. Nws thickness feem ntau me me piv rau lub vojvoog ntawm lub hnub qub, tab sis yuav luag tag nrho cov hluav taws xob kho qhov muag ntawm lub hnub qub yog tawm ntawm nws.
