Hoyle's Big Bang implies an initial acceleration and then a translating of the first energy burst into distance, and they are still fine tuning the rate at that expansion. and it is accelerating, which means more energy being expanded as we go, One alternative theory has the universe acquiring that from the spacetime that the universe expands into. another is of course that matter, stored since the beginning, is converted into energy to fuel & drivel further acceleration.
One feature of the Big Bang follow up in mainstream science, is inflation, an expansion of spacetime faster than even the speed of light.
There are many unexpected transient events in our solar system SB.
It speaks for the robustness of the resonance based harmony/stability here, that it was sturdy enough to allow fragile life to evolve over 4.5 billion years.
all done with energy and the right natural laws.
There is a theory, that universes that BIg banged with different laws, did not last to see life emerge.
My money is on that is was wrought right in the first place.
second thought, if heavy elements were only forget in the normous pressure of stars, supernovae, why was there only hydrogen and some helium after the beginning, if it was such a banging compression?