A supernova exploded across the night sky 1,000 years ago. Astronomers have now found its remnant: a ‘zombie star’
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific advances and more. For six months in the year 1181, a dying star streaked across the night sky. The striking object appeared as bright as Saturn near the constellation Cassiopeia and was recorded as a “guest star” in… Read More »