Cosmic center

The geocentric universe according to Peter Apian, from Cosmographicus Liber (1539). Visible are the inner spheres of earth, water, air, and fire - the 4 basic substances of which all things were thought to consist.

Galactocentric

Main Article: Galactocentricity

Galactocentricity is the proposition that the galaxy in which we live is at the center of the universe. A number of observations suggest a galactocentric universe, among them:

1. All objects in the universe beyond our galaxy have a red shift in their spectrum. None have a blue shift, which would imply an approaching object.
2. The degree of redshift varies directly as the distance of the object from our galaxy (Hubble's Law).
3. Quantized redshift, or the organization of extragalactic objects into distinct bands, is the strongest single observation that suggests galactocentricity.

Cosmic Center Universe

Robert Gentry has also suggested an anthropocentric cosmology, based on a static universe with a shell of matter creating cavity energy in our region. His theory is sophisticated and appeals to gravitational and relativistic redshift caused by vacuum gravity repulsion.

The theory is explicated in detail in several papers available at the Orion Foundation. Andrew Repp, a creationist, has posted a challenge to his cosmology in the Creation Society Research Quarterly. Gentry responds to this and other criticism in Big Bang Collapse and other reports found on his Published Reports Page. Brian Pitts has also criticized Gentry's model.

The seminal paper describing Gentry's view is A New Cosmic Center Cosmology. He claims a collection of several things this theory either accounts for or explains:

1. The Hubble Redshift Equation
2. A CBR Relation fitting all known CBR data
3. The recently discovered velocity dipole of radiogenic galaxies
4. The time dilation of SNe Ia time curves
5. The Sunyaev-Zeldovich Thermal Effect
6. Oibers Paradox
7. A modified Tolman relation
8. SN dimming for Z<1
9. Enhanced brightness of SN for Z>1 that fits SN 1997ff findings
10. The existence of extreme [z>10] objects (this separates it qualitatively from Big Bang)
11. The high Fe/O ratios found in BAL quasar, which Gentry claims to be contrary to current cosmology

It should be noted that Gentry's model is predictive in nature. He looks for the observation of very distant objects, which are predicted by his model but not for current cosmologies. He also used the model to predict with some accuracy the size of the vacuum energy density parameter before it was measured.

Geocentric

Main Article: Geocentricity

Geocentricity is the belief that the Earth is located at the center of the universe. Biblical creationists generally view the creation of the cosmos as an Earth-centered event, and the space beyond our world created simply to "declare the glory of God" (Psalm 19:1 ). Therefore, it is largely assumed the Earth is at the relative center of the cosmos.

However, most creationists have abandoned the notion that the Earth is at the literal center of the universe, largely because the mathematical corrections that geocentricity requires (epicycles, eccentrics, and equants) make geocentricity far too complex than is warranted.