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Gravity is the consecuence of mass deforming space-time. But why mass deforms space-time?

What if gravity is the consecuence of mass inertia in an accelerated universe. I can imagine a universe expanding at an accelerated speed that is being deformed by the inertia of the objects with mass. So gravity depends on acceleration of expansion and could be different at different stages of the evolution of universe. For instance, what if quasars are supergigantic stars at a moment in what gravity had other value smaller than the current value (because smaller acceleration value) and a supergigantic star could exist without transforming into a black hole. Why there are not supernovas nor galaxies at same distance than quasars?

Can anyone calculate the acceleration needed to achive current velocity of expansion considering the universe an hypersphere? (This is for a constantly accelerated universe)

Can anyone calculate the slope of acceleration needed to achive current velocity of expansion considering the universe an hypersphere and a start of almost zero for acceleration at the beggining and the messured current acceleration at end?

Thanks for your answers

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# What if.

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