Question: How do you justify the notion that the Earth is at the exact center of the Universe?

Answer: The red shift is approximately the same in all different directions when viewed from Earth. One possible reason for this is that the Earth is in a special position in the universe, near the center. The big bang theory allows all points to be considered as the center. The earth is not at the exact center of the universe. It obviously is not the center of the solar system, or else we would all be dead. It is not the center of the galaxy, or else we would all be dead by now.

Statement: The rest of this sounds like fitting the facts to a rather incredible hypothesis.

Reply: Maybe you are right, but maybe not. It seems to me to be a reasonable model for what is observed. The real test of the validity of the model is if it matches observations.

Statement: It also does not match all observations. Nor do you have any explanation as to how you think that gravity increases over distance.

Reply: If it does not match all observations, that would certainly discredit the model. At least, that is true if reasons can not be found to explain it. I would like to know what observations do not match the model. You know much more about the observations than I do, and I would be interested in learning your thoughts about this. It is true that I have not given any equations to show how gravity increases over distance in this model, but I have described how to create a graph showing gravity over a distance. I have not explained why gravity would increase over distance, aside from observations, or possibly my incomplete knowledge of observations.