Supernova remnant highlighted in purple in the inset. (Image: NASA/ X-ray Chandra) NASA studied ancient supernova RCW 86 with new X-ray technology. RCW 86 exploded inside a giant low-density bubble in ...
This unique interaction explains why the remnant appears much older than it is, finally reconciling ancient observations with modern X-ray data to solve this celestial mystery. For nearly twenty ...
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