Recent content by PaulR

Interestingly, the Feb2 issue of Science News (which is not peer reviewed but does have a reputation) has the following on P 75: "In a very different theory put forward by Jae-Weon Lee of the Korea Institute for Advanced Study in Seoul and his colaborators, the universe is, in effect, a giant...

Two points 1. If we were at the exact center, everything in every direction would look the same 2. If the collapse is just starting, we could not see it Collapsing matter would start from a stand still and gradually accelerating, but always below the speed limit. Today we can only see what...

Thank you for this and yes I would like to learn more. Maybe I now have enough info to understand the original question: Are we in a BH with one of the cosmic horizons serving as BH event horizon? In reading this I guess I made several assumptions: 1. A BH means a sphere 2. A BH means...

Thank you again for this detailed discussion. As I now understand it there are in fact three criteria for a sphere to be a black hole: 1. The matter in the sphere must satisfy the Schwarzschild equation 2. The sphere must not be expanding 3. The space immediately outside the sphere must be...

Thank you for understanding my point of view. As you correctly state, I am trying to focus on one specific section of space. I avoid using terms like Event Horizon specifically to return focus to a 13.7 billion light year section of space, knowing the universe is much bigger. Many of the...

I am still confused by this reply of 1/22/08 by Marcus. I am trying very hard to understand the difference between a "real" black hole and a section of space where the density satisfies the Schwarzschild formula. As I understand from the previous answers, the single other issue reuired is...

It's been 9 days since I posted. Is this thread closed?

Thank you for these clarifications. However it leads to more questions: I don't believe it is accurate to say there is nothing outside of a 13.7 billion light year radius. That radius is only based on the time the universe has existed and the speed of light. There is no reason to believe...

Vote Change I understand from the discussion that: The density of space would correspond to a 13.7 billion year black hole to an outside observer, but... A black hole cannot be expanding, so our visible universe fails this second criteria. Thus we are not in a black hole. This leads to a...

Thank you for this clarification As to R, I was referring to the 13.7 b light years based on the distance light has traveled since the universe began, not the Hubble Radius. I was noting that one can use the best estimate of the age of the universe to compute the Hubble Parameter, thus...

Thank you for this explanation. As a follow up, I have seen many estimates of the Hubble parameter and estimates of the age of the universe. If the Hubble parameter is algebraically always C/ R, why is this relation not used to refine the estimates. Instead, the best estimates of H and R...

I apologize but I am confused. I do not see why having a singularity in the past has any relation to the concept that a sphere of radius 13.7 B light years and a density of the actual current density of our universe would not be a black hole to an observer outside this sphere. What other...

This is my first post but I feel strongly that we are in a BH from the perspective of an "outsider". First - consider the density of a black hole = Mass/ Volume = 3 * C* C/ (8* G*π * R*R) Using A value for R = 13.7 billion Light Years gives a density = 9.57 E -24 g/ m^3, which is about the...