So the observable universe is flat overall but warped (compressed) in locations of gravitational fields. Is it the expansion of space which counteracts the gravitational warping thereby making it flat on average?
No. Quite the opposite, really. Through most of the history of the universe, the expansion acted to enhance any large-scale spatial curvature. The recent dark energy-dominated expansion acts in the opposite direction, but hasn't gone on long enough to significantly flatten our universe. Overall, the amount of spatial curvature has increased by a factor of about 500 since the CMB was emitted (very roughly-speaking), and by thousands more since the first atomic nuclei formed.keepit said:So the observable universe is flat overall but warped (compressed) in locations of gravitational fields. Is it the expansion of space which counteracts the gravitational warping thereby making it flat on average?
Are you referring to big bang nucleosynthesis? The expansion of the universe is not now creating hydrogen and helium. And nothing "causes" the universe to expand -- this was simply an initial condition associated with the physics of the big bang.Stephen123r said:What ever is expanding the universe it is creating energy photons which is creating hydrogen and helium.
Please substantiate this claim. Under what process is the expanding universe fueling the creation of radiation?The constant radiation noise may not be from the Big Bang but from the continual growth of the universe as it is the same energy.
The flatness of the universe has nothing what-so-ever to with gravitational fields. It is a result of the overall density of the universe -- a homogeneous universe at critical density has a flat geometry, and there are no gravitational fields in a homogeneous universe. Much of what you say is very speculative and not in keeping with mainstream cosmology. The forum is not for discussing personal theories.In this note if the entire universe is flattening then there will be a centre somewhere as this would be gravitational mass pulling the energy down. The expansion cannot cause this otherwise the universe would not be flattening.