Michio Kaku: Is our "Universe" merely a "white hole" on the back of a "black hole"?

[jAZ]

This was well worth the 10 minutes (if you like this stuff) if only for the idea that maybe our expanding universe is merely a "white hole" on the back side of another universe's black hole and that our "big bang" was possibly the formation of that black/white hole in a multiverse.

[Hydrae]

I have always been fascinated by the theory my dad passed along to me many years ago. It seems that is you calculate the density of our universe, it is about the same as for a black hole. So we may just live in a giant black hole that is within an even bigger universe.

[jidar]

Originally Posted by Hydrae

I have always been fascinated by the theory my dad passed along to me many years ago. It seems that is you calculate the density of our universe, it is about the same as for a black hole. So we may just live in a giant black hole that is within an even bigger universe.

Well your dad was blowing smoke up your ass I'm afraid.

[Hydrae]

Originally Posted by jidar

Well your dad was blowing smoke up your ass I'm afraid.

Care to elucidate?

I believe this was a theory he had read in Scientific American years ago. Certainy not going to say it is fact or that thinking may have moved in a different direction in the intervening years.

[Fish]

Originally Posted by Hydrae

I have always been fascinated by the theory my dad passed along to me many years ago. It seems that is you calculate the density of our universe, it is about the same as for a black hole. So we may just live in a giant black hole that is within an even bigger universe.

We don't really know enough about either to confidently determine their densities. We're not even sure if our universe is an open, closed, or flat universe. So it's really hard to determine correct density without knowing if it's expanding forever, shrinking, or will expand to some finite level and stop expanding. There are formulas for determining density, but they're dependent on what type of universe we're living in.

Black hole density is equally fuzzy. Some say that black hole density may be infinite or close to it. Others say that is not possible.

Also, considering that the black holes are contained within the universe, it's hard to compare the densities of two things when one exists inside the other.

[petegz28]

Originally Posted by KC Fish

We don't really know enough about either to confidently determine their densities. We're not even sure if our universe is an open, closed, or flat universe. So it's really hard to determine correct density without knowing if it's expanding forever, shrinking, or will expand to some finite level and stop expanding. There are formulas for determining density, but they're dependent on what type of universe we're living in.

Black hole density is equally fuzzy. Some say that black hole density may be infinite or close to it. Others say that is not possible.

Also, considering that the black holes are contained within the universe, it's hard to compare the densities of two things when one exists inside the other.

Well, according to the OP, a question to be asked is whether or not the black hole are within the universe or on top of the universe?

[Halfcan]

String theory is very interesting.