Ces crânes fracturés vieux de 5 000 ans nous révèlent des indices sur les sacrifices humains en Égypte ancienne

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Certains trous noirs peuvent briller davantage que des galaxies entières, avant de perdre progressivement leur éclat. Mais leur lumière ne disparaît pas toujours avec eux. C'est notamment le cas de Hanny's Voorwerp, un immense nuage de gaz découvert près d'une galaxie lointaine. Encore illuminé par le rayonnement d'un quasar aujourd'hui éteint, il conserve la trace de son ancienne activité. The post En 2007, une institutrice a découvert un immense nuage de gaz sur une image de galaxie : Hubble a ensuite étudié sa trouvaille appeared first on Science et vie.