I disagree. These fly-by tests did not measure accelerations to the accuracy required to detect the Pioneer anomaly.
During the planetary fly-by encounter the deviations of the spacecraft from standard GR based orbit codes were of the order of 10-4 m/s2 and appear to deviate significantly...
I am just trying to learn here. I am not saying GR/SR is wrong, just that the simplifications made to explore SR effects within GR weak gravitational fields may not have been fully tested or completely justified in the weak field limit.
The test is for an effect where the radial component of...
Thanks for the reference to that paper. They make in my opinion an unwarranted assumption:
"If the PA was due to some modifications of the
known laws of gravity, this should be due to a radial extraforce
affecting the orbits of the astronomical bodies"
But this is certainly NOT the case...
Pioneer Spacecraft: As far as I know, the "extra" apparent acceleration towards the sun is yet to be adequately explained or shown to be an empirical error. Given the ad-hoc nature of this experiment it may require a better one to resolve this, but it got me thinking about what is unique about...
OK I have been thinking on this for a few days now. We will inevitably end up going in circles until the smoothness of the manifold in GR is reconciled with the non-smooth nature of quantum fluctuations. I presume when this is done correctly, the root cause of inflation will become clear.
I...
You make a good point but I think your answers are not yet and may never be decidable in the fields of cosmology/physics so to some extent the following is now off topic.
Even the act of writing down a number like the Planck scale let alone what you might do with it to propagate causal...
Thanks collinsmark for a succinct explanation of the status quo. My understanding is that at the present inflation is a theoretical construct necessary to best explain observations but has not yet been shown to be either a provable consequence of GR or QM or incompatible with them?
I presume...
Any literature on the big bang usually describes the initial moments as hot and dense. The laws of thermodynamics point to a universe where entropy is increasing, so given the assumption the universe is a thermodynamically isolated system, this implies a low entropy big bang. given that minimum...