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Originally Posted by OPVerma
This is what Edwin Hubble observed from receding Galaxies but named it ' Expanding Universe and astronomers are using its figure to determine the age of the Universe.
So astronomers should correct themselves and find the volumetric increase in space with respect to time to determine the Expansion of the Universe. Receding galaxies cannot represent whole universe.
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Galactic distances are measured by observing the brightness of supernovae. Astromoners determine the rate at which the galaxies that contain those supernovae move away from Earth by measuring the red shift of light from such supernovae. Since speed is a function of time and distance, so is acceleration the rate as which speed (or velocity) changes. Hence, distance and red shift are used determine the rate of acceleration, and therefore, the time that has expired since the big bang. If astronomers somehow extrapolated a volume using the same data, that would not alter their result because volume is a but function of distances. The 'singularity' would still be calculated as occurring 13.7 billion years ago. Of course their calculations are checked and double checked and peer reviewed by the international scientific community, so it's very unlikely indeed that their math is faulty.
If you can explain the rationale for
your calculation, then I would understand the logic just as I understand the rationale and logic of the science.