Open Question: Are Dark Matter and space curvature how scientists escape from geocentrism?

Open Question: Are Dark Matter and space curvature how scientists escape from geocentrism?

Hubble:
“the unwelcome position of a favored location (i.e., geocentrism) must be avoided at all costs…such a favored position is intolerable…Therefore, in order to restore homogeneity and to escape the horror of a unique position…it must be compensated by spatial curvature. There seems to be no other escape” (The Observational Approach to Cosmology, pp. 58-59).

“Dark Energy: Is it Merely an Illusion?” ScienceDaily, Sept. 29, 2008

Have these theories arisen due to actual observations, or from philosophical biases and salvaging favorite scientific models?


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Open Question: Astronomy/density question: how much higher is the matter density in these CMB hot spots today?

Open Question: Astronomy/density question: how much higher is the matter density in these CMB hot spots today?

QUESTION:
- CMB hot spots have matter density that is about 10^-5 higher than the background average.
Let us consider the evolution of such a hot spot with the opposite assumption as above.
Assume the matter density in the hot spot is sufficient to resist the cosmological expansion and therefore remains constant, while the rest of the universe expands as
a = t^2/3
Compared to today's mean matter density in the universe (30% of the critical density),
how much higher is the matter density in these hot spots today?

it has something to with the density of background = t^-2, and i'm supposed to calculate the ratio based on the times

PLEAAAASEEE HELPPPPP


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Open Question: desribe how heat can be tranferedd through matter by collision of atoms (conduction) or througj space radiatio?