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The basic density of the universe appears to be something like one dust mote every four miles if you don't believe in "dark matter", and one dust mote every fifth of a mile if you do (using our system and Alpha Century as a model).

How is anybody expected to believe that a black hole would ever form up via gravity (or that there actually are such things as black holes) given that?

How is anybody expected to believe that a black hole would ever form up via gravity (or that there actually are such things as black holes)

Microtubules at the quantum level contain our consciousness says Penrose. Timeless and therefore eternal. Time enough to study the basic tools of cosmology.

The basic density of the universe appears to be something like one dust mote every four miles if you don't believe in "dark matter", and one dust mote every fifth of a mile if you do (using our system and Alpha Century as a model). How is anybody expected to believe that a black hole would ever form up via gravity (or that there actually are such things as black holes) given that?

An isolated black hole can simply mean that it has already consumed all or most of the matter surrounding it.

Black holes are believed to exist on various scales. There are stellar black holes (remnants of super nova star explosions) and there are huge galactic black holes at the center of galaxies with masses millions or billions times that of our sun. The existence of black holes is basically determined by the behavior of visible material surrounding it. And by 'visible' this might mean in various other frequencies of the light spectrum (infrared, x-ray, gamma rays, etc).

Based on your reasoning, there are no solid objects at all. No rocks, no asteroids, no moons, no planets, no stars, no galaxies, no nothing. Just motes of dust floating in empty space separated from each other by miles in every direction.

Glad I somehow could piece enough of those motes together to come up with this here keyboard...