Earth
Ancient supernovae may be recorded in Antarctic ice
An ice core shows what may be the chemical traces of supernovae that exploded 1000 years ago – the method could reveal a detailed history of the galaxy's stellar explosions
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An ice core shows what may be the chemical traces of supernovae that exploded 1000 years ago – the method could reveal a detailed history of the galaxy's stellar explosions
The most popular space stories of the year include a gallery of spooky cosmic images and an exploration of whether the universe existed before the big bang