Astronomers Uncover More Intriguing Detail in an Ancient Supernova Remnant

When a supernova exploded in 1181, Chinese and Japanese sky-watchers recorded it. They couldn't have known what the object was, and why it appeared for six months then disappeared. But in our modern times, we know it was a supernova, and we've even, most likely, found its remnant. New observations reveal more detail than ever in the unusual and rare supernova remnant.

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