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## Main Question or Discussion Point

What particles that constitute the black holes?Does normal particles constitute the black holes?

How can we calculate the ratio of types of particles in the universe(we consider known matter but not consider dark energy and dark matter)?How can we calculate the total number of particles in the universe?

How can we calculate the ratio of types of particles in the universe(we consider known matter but not consider dark energy and dark matter)?How can we calculate the total number of particles in the universe?