Galactocentricity

[W]e live in a galactocentric cosmos—a universe that has a unique geometric centre very near our own home galaxy, the Milky Way. As I mentioned at the end of section 4, the cosmic microwave background (CMB) data suggest that our galaxy is moving with respect to the centre of the universe. Our galaxy is essentially at the centre of the cosmos, but not at rest with respect to it. This differs from geocentrism, which would have the Earth be at the exact centre and motionless with respect to it.

In cosmology, the Copernican principle, named after Nicolaus Copernicus, states the Earth is not in a central, specially favoured position.

In the earliest cosmologies, man placed himself in a commanding position at the centre of the universe. Since the time of Copernicus we have been steadily demoted to a medium sized planet going round a medium sized star on the outer edge of a fairly average galaxy, which is itself simply one of a local group of galaxies. Indeed we are now so democratic that we would not claim that our position in space is specially distinguished in any way. We shall, following Bondi (1960), call this assumption the Copernican principle.

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A reasonable interpretation of this somewhat vague principle is to understand it as implying that, when viewed on a suitable scale, the universe is approximately spatially homogenous

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in which the universe is isotropic about every point in space time; so we shall interpret the Copernican principle as stating that the universe is approximately spherically symmetric about every point (since it is approximately spherically symmetric around us).

Hawking, S.W. and Ellis, G.F.R., The Large Scale Structure of Space-Time, Cambridge University Press, Cambridge, p. 134, 1973. Their reference is to: Bondi, H., Cosmology, Cambridge University Press, Cambridge, 1960. (as quoted in Our Galaxy is the Center of the Universe, ‘Quantized’ Redshifts Show)

The assumption of uniformity has much to be said in its favour. If the distribution were not uniform, it would either increase with distance, or decrease. But we would not expect to find a distribution in which the density increases with distance, symmetrically in all directions. Such a condition would imply that we occupy a unique position in the universe, analogous, in a sense, to the ancient conception of a central earth. The hypothesis cannot be disproved but it is unwelcome and would be accepted only as a last resort in order to save the phenomena. Therefore, we disregard this possibility and consider the alternative, namely, a distribution which thins out with distance.

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Both explanations seem plausible, but neither is permitted by the observations. The apparent departures from uniformity in the World Picture are fully compensated by the minimum possible corrections for redshifts on any interpretation. No margin is left for a thinning out. The true distribution must either be uniform or increase outward, leaving the observer in a unique position. But the unwelcome supposition of a favoured location must be avoided at all costs. Therefore, we accept the uniform distribution, and assume that space is sensibly transparent. Then the data from the surveys are simply and fully accounted for by the energy corrections alone - without the additional postulate of an expanding universe.

emphasis added

The departures from uniformity are positive; the numbers of nebulae increase faster than the volume of space through which they are scattered. Thus the density of the nebular distribution increases outwards, symmetrically in all directions, leaving the observer in a unique position. Such a favoured position, of course, is intolerable; moreover, it represents a discrepancy with the theory, because the theory postulates homogeneity. Therefore, in order to restore homogeneity, and to escape the horror of a unique position, the departures from uniformity, which are introduced by the recession factors, must be compensated by the second term representing effects of spatial curvature.
There seems to be no other escape.

emphasis added

People need to be aware that there is a range of models that could explain the observations,...For instance, I can construct you a spherically symmetrical universe with Earth at its center, and you cannot disprove it based on observations. ...You can only exclude it on philosophical grounds. In my view there is absolutely nothing wrong in that. What I want to bring into the open is the fact that we are using philosophical criteria in choosing our models. A lot of cosmology tries to hide that.

W.W. Gibbs, “Profile: George F. R. Ellis”, Scientific American 273(4): 28-29 (1995)
emphasis added

However we are not able to make cosmological models without some admixture of ideology.

Hawking, S.W. and Ellis, G.F.R., The Large Scale Structure of Space-Time, Cambridge University Press, Cambridge, p. 134, 1973. Their reference is to: Bondi, H., Cosmology, Cambridge University Press, Cambridge, 1960. (as quoted in Our Galaxy is the Center of the Universe, ‘Quantized’ Redshifts Show)

Now at first sight, all the evidence that the universe looks the same whichever direction we look in might seem to suggest there is something special about our place in the universe. In particular, it might seem that if we observe all other galaxies moving away from us, then we must be at the center of the universe. There is, however, an alternative explanation: the universe might look the same in every direction as seen from any other galaxy, too. This, as we have seen, was [Russian physicist Alexander] Friedman's second assumption. We have no scientific evidence for, or against, this assumption. We believe it on the grounds of modesty; it would be most remarkable if the universe looked the same in every direction around us, but not around all other points in the universe!

Hawking, S.W., The Illustrated A Brief History of Time, Bantam Books, 1996; pp. 56-57
emphasis added

Then God said, "Let us make man in our image, in our likeness, and let them rule over the fish of the sea and the birds of the air, over the livestock, over all the earth, [b] and over all the creatures that move along the ground." So God created man in his own image, in the image of God he created him; male and female he created them.

"But you must not eat meat that has its lifeblood still in it. And for your lifeblood I will surely demand an accounting. I will demand an accounting from every animal. And from each man, too, I will demand an accounting for the life of his fellow man."Whoever sheds the blood of man, by man shall his blood be shed; for in the image of God has God made man. As for you, be fruitful and increase in number; multiply on the earth and increase upon it."

For this is what the LORD says— he who created the heavens, he is God; he who fashioned and made the earth, he founded it; he did not create it to be empty, but formed it to be inhabited— he says: "I am the LORD, and there is no other.

O LORD, our Lord, how majestic is your name in all the earth! You have set your glory above the heavens. From the lips of children and infants you have ordained praise because of your enemies, to silence the foe and the avenger. When I consider your heavens, the work of your fingers, the moon and the stars, which you have set in place, what is man that you are mindful of him, the son of man that you care for him? You made him a little lower than the heavenly beings and crowned him with glory and honor. You made him ruler over the works of your hands; you put everything under his feet: all flocks and herds, and the beasts of the field, the birds of the air, and the fish of the sea, all that swim the paths of the seas. O LORD, our Lord, how majestic is your name in all the earth!

Then the data from the surveys are simply and fully accounted for by the energy corrections alone - without the additional postulate of an expanding universe.

see above - emphasis added

The assumption of uniformity has much to be said in its favour. If the distribution were not uniform, it would either increase with distance, or decrease. But we would not expect to find a distribution in which the density increases with distance, symmetrically in all directions.

[...]

The apparent departures from uniformity in the World Picture are fully compensated by the minimum possible corrections for redshifts on any interpretation. No margin is left for a thinning out. The true distribution must either be uniform or increase outward, leaving the observer in a unique position.

[...]

The departures from uniformity are positive; the numbers of nebulae increase faster than the volume of space through which they are scattered. Thus the density of the nebular distribution increases outwards, symmetrically in all directions, leaving the observer in a unique position.