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The Economic Times

Global Business / The Economic Times

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2,000-year-old guest star mystery from 185 AD solved by NASA X-ray study

Ancient Chinese astronomers saw a bright guest star in 185 AD. This supernova remnant, RCW 86, was unusually large. New research reveals the star exploded in a hidden bubble it created. This allowed debris to expand rapidly. A 'bounce back' effect from denser gas sent shockwaves, reheating gas. Chandra X-rays confirmed this.

25 Mar 2026 5:25 pm