How It Works

How big can black holes get?

- Miguel Sanchez

A black hole’s growth starts to slow at around 10 billion solar masses – one solar mass being the weight of our Sun. Black holes have a theoretica­l upper limit of 50 billion solar masses, at which point gas in the accretion disc – the halo formed by matter being sucked in by the black hole – surroundin­g the ultramassi­ve object would begin to form stars.

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