Could Our Universe Be a Black Hole?

Question

I Read In A Book That The Average Density of The Universe that Scientists Have Calculated Matches Well With What They Think the Density of Black Holes Should Be. Is There Any Truth to This?

Answer 1

Yes there is some truth.
But a new theory on the Universe and rules of laws of physics would change these calculations.

http://news.yahoo.com/s/space/20060711/sc_space/scientistsquestionnaturesfundamentallaws

Answer 2

This is a bit of a strange question for you, you seem to usually be so knowledgeable in this area. There is nothing essentially special about a black hole, it is simply a region of space in which matter has become sufficiently dense to bend space-time around it so greatly that light cannot escape. I'm not sure what that critical density is, but it's fantastically high. The density of our universe, as you can tell just by looking up at the night sky, is very low, and certainly no where near that required to form a black hole.

Answer 3

yes. i am part of the Columbus Astronomical Society (CAS) and being part of this i have done some research into the field of theoretical physics (the same field as Hawking or Einstein). i have too come across this theory. the are many elaborate mathematical equations to prove this possible (all of which are too big to put on this page). the basic concept of it is a black hole without a core, and as we pass through this black hole the universe seems to expand. in a black hole all of the particles are crushed into tiny pieces. in reality we are not being crushed, so i don't think this is probable unless the black hole is without a core. it also allows for infinite atoms to fit inside a given space allowing for us to view the universe as infinite though it is not in a way. this would also make the universe the fourth dimension. that is the best i can do off of the top of my head. i do believe that this is not only possible but also probable. try other web sites for better more in depth (and confusing) answers.

Answer 4

In some early theories of the universe, it was believed that at a far enough distance, the expansion of the universe approaches the speed of light. In such case, that point becomes a boundary that light cannot pass through. This is analagous to the "event horizon" that defines a black hole (light cannot escape), so the universe would appear to be a black hole from an external point of view. I do not believe that this theory is still accepted today.

Answer 5

What! Not exactly. A black hole is what remains after the death of a star or it is the final stag of a star. It is true that a black hole exists somewhere in the middle of our galaxy.

Answer 6

Basically, no...if I'm interpreting what our dear Professor Hawkings has been telling us correctly, a black hole will basically pull all matter apart...if we were actually living in a black hole, I believe that we would just not exist, I could be interpreting him incorrectly though...