Mystery of oldest-recorded supernova solved | News | National Post
http://news.nationalpost.com/2011/10/25/mystery-of-oldest-recorded-supernova-solved/
NASA望远镜揭两千年前超新星爆炸之谜(图)_科技频道_凤凰网
http://tech.ifeng.com/discovery/detail_2011_10/26/10153213_0.shtml
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