New study calculates the number of black holes in the universe

(ORDO NEWS) — Because we can’t see black holes, it’s hard to say exactly how many there are in the universe.

But that doesn’t mean we can’t try to figure it out.

Stellar-mass black holes are the collapsed cores of dead massive stars, and a new study has provided a new estimate for the number of stellar-mass black holes in the universe.

The number is quite staggering: 40 quintillion, or 40,000,000,000,000,000,000 black holes, which is about 1 percent of all ordinary matter in the observable universe.

Black holes are a huge question mark looming over our understanding of the universe, or rather, a lot of question marks. But if we have a good idea of ​​how many black holes exist, it could help answer some of these questions.

One approach is to estimate the history of massive stars in the universe. Then we can calculate the number of black holes that should be in any given volume of space.

This knowledge could provide clues to the growth and evolution of supermassive black holes, millions or billions of times the mass of the Sun, that make up the cores of galaxies.


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