Science

... you mentioned the radius of a black hole twice. I've always understood the radius of a black hole to be ... zero! That's because it's a point source of intense gravity, which is why it's sometimes called a gravitational singularity. Another of the really weird things about black holes. Maybe you were talking about the radius of the black hole's event horizon? As I said, all this stuff is way over my head. I know a little about it just from the perspective of a fan of science fiction, and of science popularizers like Carl Sagan and Isaac Asimov. It sounds like you could be another Sagan or Asimov, if you want to explore your option. Thanks for trying to educate me.

-- Ron