https://www.google.com/search?client=firefox-b-1-d&sca_esv=6842d0e1526f3b6d&q=hr+diagram&udm=2&fbs=ABzOT_BnMAgCWdhr5zilP5f1cnRvJ3SHQcDVxkdpDyHwlRhdNfno-ClRh0PKqyvFYyTkfIfP_ihkkKoG36BofI98kDl70s_1-6ZoLTpilOeG6_oVetbrrobnQdKtpdBYZIfJv7aFm76dCXAwXXFZVD6G5XyDWeBCoWC278WDSG1ZWvbzUTx8D-nzMAtFfKgPsHJXgVGFFgYCCG7dW23JxU73B8yKKS8RRA&sa=X&ved=2ahUKEwitltH49rKLAxVNLdAFHV_fK70QtKgLegQIERAB&biw=1196&bih=709&dpr=2 https://en.wikipedia.org/wiki/Stellar_classification#/media/File:Stellar_Classification_Chart.png