Tycho Brahe's diagram of the constellation Cassiopeia. The large star at the top, labelled I Nova Stella, is in fact the supernova of 1572. Its official name is SN1572, but it is referred to as Tycho's Supernova or Tycho's Nova

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Keywords: 1572, astronomy, brahe, cassiopeia, constellation, diagram, drawing, illustration, nova, observation, observations, sn1572, supernova, tycho, tychos