3 ms·
> More oddly still as you approach the size of the observable universe, the required mass density crosses the cosmic mass density, meaning light emitted from Ea
by yaks_hairbrush 9y ago
> More oddly still as you approach the size of the observable universe, the required mass density crosses the cosmic mass density, meaning light emitted from Earth cannot gravitationally escape the universe created by the Big Bang
This is true...
> meaning we exist inside of a black hole as big as the observable universe.
This is an unwarranted jump. I'd recommend looking at the reference [0] from Sean Carroll.
[0] http://www.preposterousuniverse.com/blog/2010/04/28/the-universe-is-not-a-black-hole/ http://www.preposterousuniverse.com/blog/2010/04/28/the-univ...
- garmaine 9y agoThere is nothing to be learned in that article. He says that the question is nonsense because we don’t know what is outside the observable universe. That’s not a very interesting thought restriction.