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Start of darkness

发布时间:2019-03-06 10:19:09来源:未知点击:

By Hazel Muir WHICH came first, the galaxy or the black hole? That question has been puzzling astronomers ever since they discovered that most galaxies have a monster black hole at their core. Now observations of one such black-hearted galaxy suggest that the galaxy came first. Black holes formed later from individual stars in tight-knit clusters,