The last Supernova visible to the naked eye occurred in the large Magellanic Cloud on February 24, 1987, reaching a Magnitude of 4.3 [An Apparent Magnitude of 6 or less is visible to the naked eye].
This was the first time since 1604 that it was possible to see a Supernova with the unaided eye!
This was a sign for this generation!
See F. Chris Patrick’s Video “The Rapture Sign In the Heavens” describing this phenomenon!