Tycho Brahe Observes Supernova

On November 11, 1572, Danish astronomer Tycho Brahe observed a supernova in the constellation Cassiopeia from Herrevad Abbey. Through careful measurements made without a telescope, Brahe determined the object was located beyond the Moon's orbit. The supernova remained visible to the naked eye until March 1574, reaching brightness comparable to Venus. Brahe documented his findings in "De Nova Stella" (1573). His observations contradicted Aristotelian belief that the heavens were unchangeable and provided evidence supporting the Copernican heliocentric model. The supernova is now designated SN 1572.