A new telescope image has shed light on the ghostly remains of the first recorded supernova
. More than 1,800 years ago, in the year 185, Chinese astronomers recorded what they called a “guest star” after a bright new light appeared in the night sky. This brightness resulted when a star exploded some 8,000 light-years away, between the constellations of Circinus and Centaurus, into a supernova; the bright event was visible for eight months before fading from view to the naked eye. Known today as SN 185, it is considered the first recorded supernova in history.
Initially, astronomers believed that when a massive star explodes in a supernova, it would take about 10,000 years for the remnants of that explosion to form a ring-like structure such as the one visible in the Dark Energy Camera’s new image. But researchers now suspect this supernova experienced an extremely high expansion velocity, meaning the ring structure could form in as little as about 2,000 years after its explosion.
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