Pictures of a distant supernova remnant show two concentric rings, providing clear evidence that exploding white dwarf stars go boom twice in the blink of an eye
Več na: https://www.newscientist.com/article/2486512-stunning-image-of-a-supernova-reveals-a-dead-star-that-exploded-twice/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home
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