1006 supernova
Calibration case. The brightest supernova in history, recorded in China, Japan, the Arab world, Europe and possibly Native American rock art.
How it connects
This mystery we read it in
Stephenson and Green 2002, Historical Supernovae and their Remnants
This mystery has this clue
Supernova remnant SN 1006
This mystery has this clue
Guest star of 1006 across four cultures