Counting up the guest stars mentioned in ancient records, modern researchers have found that after one discounts comets, ancient Chinese astronomers observed nearly 90 of these brilliant events. It is interesting to note that the stars which explode into novas and supernovas are, before the explosions, relatively dim.
經過考證，扣除明顯移動的彗星，這些光度微弱，因為爆炸才眾目睽睽的星體，在中國有將近九十次紀錄。