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


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


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Photo credit: © World History Archive / Alamy / Afripics
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Keywords: ., 000, 4, 30, 443, ages, archival, archive, astronomy, credit, environments., gamma, gev, historical, history, ic, middle-aged, nasa., photograph, rays, remnants, resolved, science, supernova, w44, w51c, years