TheZamonaviy currentyulduz stellarsinflantirish classificationXX systemasr originatedboshlarida inkelib thechiqib, early[[neytral 20thvodorod century,radiochizigʻi]] whenkuchiga starsasoslangan wereholda classified fromyulduzlar ''A'' todan ''Q'' basedgacha onsinflarga the strength of the [[hydrogen line]]ajratilgan.<ref>{{cite journal
| last=Fowler | first=A.
| title=The Draper Catalogue of Stellar Spectra
| journal=Nature
| year=1891–2 | volume=45 | pages=427–8 | doi = 10.1038/045427a0 |bibcode = 1892Natur..45..427F }}</ref> ItU waspaytda notvodorod knownchizigʻiga atharorat thekatta timetaʼsir thatetishi thenomaʼlum major influence on the line strength was temperatureedi; thevodorod hydrogen line strength reaches a peak at overchizigʻi 9000 K,andatrofida ischoʻqqiga weakerchiqib, atundan bothbaland hotteryoki andpast coolerharoratlarda temperatureskuchsizlashadi. WhenTasnif theharorat classificationsboʻyicha wereqayta reorderedtartibga by temperaturesolinib, it more closely resembledzamonaviy the[[tarx]]ga modernyaqin schemekeldi.<ref name=carlos>{{cite book
