In the year 185 A.D. Chinese astronomers witnessed a temporary 'guest star' emerge in the sky.
Calculations from previous studies estimated that it would take 10,000 years for material to disperse so far away from the dead star. In 2006, however, astronomers found evidence that the shell developed at a much faster rate than they had originally believed.
These types of supernovas, known as Type Ia supernova, produce so much light that the phenomenon wouldn't go unnoticed even in the distant past when astronomers were limited to naked eye observations. "These supernovae are the brightest of all and no doubt SN 185 would have awed observers while it shone brightly in the night sky," researchers wrote in the statement.
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