This Day in Geek History: April 30
1006
Supernova SN 1006, the brightest supernova in recorded history, occurs in the southern constellation Lupus, near the star Beta Lupi. Chinese and Arabic astronomers note the supernova, but the speed of the still-expanding shock wave won’t be measured for nearly a millennium. The event is also recorded by observers in Egypt, Iraq, Italy, Japan, and Switzerland. From the careful descriptions recorded by Chinese astronomers of how the light varies, the Supernova is apparently yellow in color and visible for over a year.
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