Complex sentence: The earliest recorded supernova, SN 185, was viewed by Chinese astronomers in 185 AD, with the brightest recorded supernova being SN 1006, which occurred in 1006 AD and was described in detail by Chinese and Islamic astronomers.
Split into simpler sentences: The earliest recorded supernova, SN 185, was viewed by Chinese astronomers in 185 AD. The brightest recorded supernova was SN 1006, which occurred in 1006 AD and was described in detail by Chinese and Islamic astronomers.