Page from Tycho Brahe's De nova stella — Star map of the constellation Cassiopeia showing the position of the Supernova of 1572. The labeled stars are: A caput Caßiopeæ (ζ Cas) B pectus Schedir. (α Cas) C Cingulum (η Cas) D flexura ad Ilia (γ Cas) E Genu (δ Cas) F Pes (ε Cas) G suprema Cathedræ (β Cas) H media Chatedræ (κ Cas) I Noua stella. (SN 1572)
Photo Credit: By Tycho Brahe - Brahe, Tychonis (1573) Public Domain, https://commons.wikimedia.org/w/index.php?curid=14312843