Zero. There are ZERO known black holes. Never mind all the yadda, all the movies, all the theories. In fact, the idea of black holes is falling out of favor with some physicists.
Just because something is possible in theory doesn’t mean it really exists. It takes actual observations and measurements to verify that something exists.
Einstein got famous because he attacked fuzzy ideas (in his case, he attacked ‘absolute time’, which was a popular idea for 200 years).
Nobody can answer that question because nobody really knows how big the universe really is.
Recent studies indicate that far less black holes exist
than predicted as early as a year ago…
Zero. There are ZERO known black holes. Never mind all the yadda, all the movies, all the theories. In fact, the idea of black holes is falling out of favor with some physicists.
Just because something is possible in theory doesn’t mean it really exists. It takes actual observations and measurements to verify that something exists.
Einstein got famous because he attacked fuzzy ideas (in his case, he attacked ‘absolute time’, which was a popular idea for 200 years).