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There are so goddamn many

The Hubble Ultra Deep Field, showing nearly 10,000 galaxies.
The Hubble Ultra Deep Field, showing nearly 10,000 galaxies. Image: NASA, ESA, S. Beckwith (STScI) and the HUDF Team

Because supermassive black holes sit at the center of galaxies, you’d be forgiven for thinking of the objects as the few amongst the countless stars, exoplanets, asteroids, molecular clouds, neutron stars, and other things that make up our universe. But there are tons of black holes. In 2022, a team of researchers calculated that there may be 40 quintillion (that’s 40 billion billion) black holes in the observable universe. Of course, the universe is a big place—but to think about the amount of stuff within it gives that scale a whole new dimension.