Measuring dark matter halos around ancient quasars

At the center of every galaxy is a supermassive black hole. Beyond a certain size, these become active, emitting huge amounts of radiation, and are then called quasars. It is thought these are activated by the presence of ...

Machine learning reveals how black holes grow

As different as they may seem, black holes and Las Vegas have one thing in common: What happens there stays there—much to the frustration of astrophysicists trying to understand how, when and why black holes form and grow.

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