The most detailed x-ray image yet of one of the youngest known supernova remnants–the debris cloud created when a massive star explodes–solves a long-standing mystery about how the star died, an astronomer announced on Tuesday.
The most detailed x-ray image yet of one of the youngest known supernova remnants–the debris cloud created when a massive star explodes–solves a long-standing mystery about how the star died, an astronomer announced on Tuesday.