Nearly2,000yearsago,Chineseastronomersspotte dabrightlightmaterializinginthenightsky.Tur nsouttheskywatchershadwitnessedthespectacularexplosionofadyingstar.
Thatwastheyear185AD.Todayastronomerssaidthey mighthaveidentifiedtheremainsfromthisancien tstellarexplosion,nowconsideredtheoldestsupernovaonrecord.
“Ithinkitisveryinterestingthatwecannowsaywit hsomeconfidence,butnotabsolutecertainty,tha tRCW86istheremnantofAD185,”saidJaccoVinkoftheUniversityofUtrecht,theNetherlands
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