6 ms·
My biggest problem with the big bang is why didn't the incredible density of energy (it hadn't cooled enough for matter) just turn into a black hole? The big b
by sliken 6y ago
My biggest problem with the big bang is why didn't the incredible density of energy (it hadn't cooled enough for matter) just turn into a black hole?
The big bounce avoids this particular problem.
- JesseMeyer 6y agoInflationary theory. Someone more educated on the topic can pine in, but my lay understanding is that the output of some form of primeval radioactive decay (Big Bang) caused a phenomenal rate of spacial expansion, which caused space to expand faster than the rate of gravitational collapse in those first moments.
- sliken 6y agoIt's not the rate of gravitational collapse you have to beat, it's the speed of light. Although I guess that makes sense. After all it's spacetime, not space. So if the expansion rate is higher than the speed of light, then you don't have the black hole problem.
- mensetmanusman 6y agoThere has to be spacetime to form a black hole, where would it find such spacetime before the big bang...
- sliken 6y agoWell what about 0.000001 seconds after the big bang (add zeros as needed).
- LockAndLol 6y agoWhy does it avoid the problem? > Over billions of years a contracting scale factor brings everything a bit closer, but not all the way down to a point. The dramatic change comes from the Hubble radius, which rushes in and eventually becomes microscopic All the matter of universe at a microscopic radius? That doesn't avoid the problem.
- meroes 6y agoThe universe is and always was infinite even at the big bang. At the big bang although the universe was incredibly dense it was so uniform there was no net direction of gravity to cause clumping. That and inflation rapidly expanding away any quantum imperfections beyond causal contact.