One thousand seven years ago, observers in China, Egypt, Iraq, Japan, and Switzerland recorded a new object in the sky. It was hard to miss. Scientists now believe SN 1006 was the brightest supernova in recorded human history. It was described by ancient astronomers as being low on the horizon but shining about half or a quarter as bright as the Moon. It could sometimes be seen during daylight hours and may have been bright enough to read by at night. How far was it from Earth? Discuss (http://forum.thefreedictionary.com/postst35778_Brightest-Supernova-in-Recorded-History-Appears-in-Night-Sky--1006-.aspx)
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