Chinese astronomers in 185 AD were the first to observe the mysterious 'guest star' that suddenly appeared. And modern-day scientists have remained baffled by the huge size of the ancient supernova - until now. 25 Oct, 2011
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Source: http://www.dailymail.co.uk/sciencetech/article-2053167/Scientists-solve-riddle-supernova-detected-man--2-000-years-ago.html?ITO=1490
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