Oscillation of our giant, gaseous neighbour

the Radcliffe Wave not only looks like a wave, but also moves like one -- oscillating through space-time much like 'the wave' moving through a stadium full of fans.

Gravity is pushed from behind by more gravity in a mechanical wave like a crowd-wave at a football game, the push angles are quantized by the universal stacking system.

Those are the fundamental physics of the universe, nothing else really matters.