Explanation:
It is challenging to determine the exact number of black holes in the universe because black holes are not directly observable and can only be detected through their effects on surrounding matter or through indirect observations. However, scientists estimate that there are potentially millions to billions of black holes in our Milky Way galaxy alone.
Beyond our galaxy, there are likely countless more black holes scattered throughout the universe, varying in size from stellar-mass black holes to supermassive black holes that reside at the centers of galaxies. The exact number of black holes in the universe remains a topic of ongoing research and exploration in the field of astrophysics.
Answer:
By combining information about stars, black holes, and stellar and cosmic evolution all together, astronomers have the first robust estimate for black holes in the Universe: 40 quintillion.
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