Photo de stock - Supernova remnants resolved at GeV gamma rays from of different ages and in different environments. W51C, W44 and IC 443 are middle_aged remnants between 4,000 and 30,000 years old. Credit NASA. Science Astronomy

Photo de stock: Supernova remnants resolved at GeV gamma rays from of different ages and in different environments. W51C, W44 and IC 443 are middle-aged remnants between 4.

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