The core of massive dying galaxies already formed 1.5 billion years after the Big Bang

The most distant dying galaxy discovered so far, more massive than our Milky Way — with more than a trillion stars — has revealed that the ‘cores’ of these systems had formed already 1.5 billion years after the Big Bang, about 1 billion years earlier than previous measurements revealed. …
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Enlace: The core of massive dying galaxies already formed 1.5 billion years after the Big Bang