if there is even just one blackhole, wouldnt it just keep on consuming matter and eventually consume everything?
In: Planetary Science
Like others said, black holes don’t actively drag things in, they’re no more dangerous than a star of the same mass. But for the sake of argument, let’s suppose they *were* as ravenous as popularly believed.
Even if it *did* just keep on consuming, there’s a limit to how fast black holes can eat. Try to stuff too much matter into it at once and it starts getting bumped out of the accretion disk before it can fall in.
Even if it *did* just keep growing, empty space has a whole lot of… well… empty space. If it consumed an entire galaxy, there wouldn’t be anything else unless there were others close enough by to be affected by its gravity.
Even if it *did* consume an entire *cluster* of galaxies, it would take so long that the expansion of space would certainly cut off its supply after that.
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