A supernova shone in the night sky 1,000 years ago. Astronomers have now found its leftover ‘zombie star’
By Jacopo Prisco, CNN (CNN) — For six months in 1181, a dying star left a mark in the night sky. The striking object appeared as bright as Saturn in the vicinity of the constellation Cassiopeia, and historical chronicles from China and Japan recorded it as a “guest star.” Chinese astronomers used this term to
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