Last 'decent' naked eye supernova was surely Kepler's Supernova of 1604. And the recent fading of Betelgeuse wasn't all that unusual for a fairly typical red supergiant pulsating star.
Last 'decent' naked eye supernova was surely Kepler's Supernova of 1604. And the recent fading of Betelgeuse wasn't all that unusual for a fairly typical red supergiant pulsating star.