📅 11 November 1572
Tycho Brahe saw a brilliant new object in Cassiopeia; it was later identified as the supernova SN 1572.
📅 11 November 1572
The bright star-like object stood in a familiar constellation, challenging beliefs that the distant heavens never changed.
📅 11 November 1572
Tycho's subsequent careful measurements tracked the object's position and brightness; the first sighting was on this date.
📅 11 November 1572
The appearance of SN 1572 opened new arguments about celestial change; its physical interpretation came centuries later.
