Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: lukaradulovic on 11/03/2016 14:56:24

Title: Could the Universe be a black hole?
Post by: lukaradulovic on 11/03/2016 14:56:24
If the universe started as a point of really small (if any) size, but with a mass and energy potential of a whole universe, how come it didn't just collapse into a black hole?
Title: Re: Could the Universe be a black hole?
Post by: JoeBrown on 11/03/2016 15:45:31
The Lambda CDM model (big bang theory) doesn't apply gravity to the universe until after the initial expansion of the universe.  They oddly they say after gravity came to be the universe started gaining momentum, due to some inexplicable force termed Dark Energy.

BB theory has a lot of flaws, IMO.  These are a few of 'em.

We don't know why mass gained properties of gravity.  But it seems that it happened at or about the time matter came into existence.  Beyond that point physics as we understand them, do not compute -- the laws may have changed, who can say? Currently there is no definitive answer, we're kinda left speculating.

Lambda-CDM is the most organized set of postulations attempting to explain sequences that may have happened and are the most "accepted" set of postulations.   But honestly, we don't know.  Could be an omni-present god.  Tho I expect if BB is right, god's bb kit made a mess of his lab.   [;)]
Title: Re: Could the Universe be a black hole?
Post by: evan_au on 12/03/2016 01:08:22
Quote from: lukaradulovic
If the universe started as a point of really small (if any) size, but with a mass and energy potential of a whole universe, how come it didn't just collapse into a black hole
It is thought that after the end of "cosmic inflation", the entire mass of the universe may have occupied the volume of a grapefruit.

A grapefruit with the mass of a zillion galaxies is already inside a black hole - there is no need to "collapse into a black hole".

This is something physicists don't like to talk about - this event obstructs their horizons too much.