Clearly there can be an infinite number of Heaven and Hells.
Limited only by the imagination.
However, I think a basic foundation of science writers is to take what applies to sub-atomic particles and apply it to larger items, including living beings.
Wind up and throw hard enough and one can propel a neutron through a wall. But one can't do that with a baseball. Or person or spaceship.
I happen to believe there are an infinite number of Heavens and Hells, but they are all on Earth.
Arf