I don't subscribe to the big bang theory, but accept there is universal expansion, and Earth and moon probably resulted from collision. The big bang theory is just too tenuous and contrived, with too many unanswerable questions and assumptions, and seems to be something resulting from an innate human wish for all things to be limited, so that they can be made profit from, giving rise now to an existential misunderstanding about energy.

A lot of profit has been made from the big bang theory I think :)

Getting our heads out of the idea that everything has to be in exchange for something else, for profit, efficiency, etc, enables us to accept some things are truly unlimited, at least for all practical purposes, like the energy of the sun, which is the only actual source of energy, and that energy, from the only source of it, is donated to us, for nothing, it is truly free, and incredibly valuable.

To me, the logic defying belief that the energy of the sun can't support us, is intricately connected with the mistaken belief of the big bang, the same mindsets that seem to most readily accept the big bang theory, demanding everyone else believe it also, are the ones that also mistakenly believe the sun can't support us.

I am not sure why no-one seems to have investigated the effects of universal expansion at atomic level. If all space is expanding, and we see that it is, why would the atoms we are comprised of not themselves be also expanding? This would explain gravity to me, we would be expeiencing a constant acceleration into space, if the atoms comprising our bodies, and the much larger mass of atoms of Earth were all individually expanding, of course we would be stuck to the surface of the much large mass expanding continually outwards.

Further, if this was the case, if follows gravity waves are actually perturbations in the rate of expansion, and if there were theoretical ways of locally interfering with that, there we might see the possibilities of multiple universes existing within the same space, and how to theoretically "slip" from one to another.