Physics Question #137

Becca Thompson, a 12 year old female from the Internet asks on February 20, 2000,

What are the names and locations in the universe of known black holes?

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The answer

Barry Shell answered on February 20, 2000

There are probably billions of black holes. Many astrophysicists think there's a black hole at the centre of most galaxies, and there are hundreds of billions of galaxies. There may be many other black holes besides these. The problem with finding out where a black hole is located is that, by definition, you cannot see black holes. People theorize that black holes might be located in specific places, but nobody knows for sure.

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