Historical Remnant of A Supernova!

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In 185 AD Chinese astronomers caught glimpse of a new star in the  Nanmen asterism. A phrase previously unknown to me which refers to a very specific portion of the galactic cosmos ceiling (thing). It also may be the earliest recorded supernova.

NASA:

In 185 AD,  Chinese astronomers  recorded the appearance of a new star in the Nanmen asterism – a part of the sky identified with Alpha and Beta Centauri on modern star charts. The new star was visible for months and is thought to be the earliest  recorded supernova. This  multiwavelengthcomposite image from orbiting telescopes of the 21st century, XMM-Newton and Chandra in X-rays, and Spitzer and WISE in infrared,  show supernova remnant RCW 86, understood to be the remnant of that  stellar explosion. The  false-color view  shows interstellar gas heated by the expanding supernova shock wave at X-ray energies (blue and green) and interstellar dust radiating at cooler temperatures in infrared light (yellow and red). An abundance of the element iron and lack of a neutron star or pulsar in the remnant suggest that the original supernova was Type Ia.  Type Ia supernovae  are thermonuclear explosions thatdestroy  a white dwarf star as it accretes material from a companion in a binary star system. Shock velocities  measured in  the X-ray emitting shell and infrared dust temperatures indicate that the remnant is expanding extremely rapidly into a remarkable low density bubble created before the explosion by the white dwarf system. Near the plane of our  Milky Way  Galaxy, RCW 86 is about 8,200 light-years away and has an estimated radius of 50 light-years.

Swag! (I know, that word isn’t cool anymore.)