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1138
1138 • Ly Anh Tong is enthroned as emperor of Đại Việt at the age of two, starting a 37-year reign. |
1181
Age: 43y
1181 • Chinese and Japanese astronomers observe what has since come to be understood as a supernova. One of only eight supernovae in the Milky Way observed in recorded history, it appears in the constellation Cassiopeia and is visible in the night sky for about 185 days. The radio source 3C58 is thought to be the remnant from this event. |