/sci/ - Science & Math

On a quantum level particles move randomly everywhere. Kind of like Brownian motion. They take a tiny step (maybe like Planck length) towards a random direction gazillions of times a second (maybe every Planck time).

Since there is more space where other particles/energy exists (stress-energy-tensor) particles are more likely to move towards each other than anywhere else. So during these gazillions of tiny motions they are slowly and randomly drifting towards each other.

It might seem that this wouldn't explain the acceleration that we see with gravity but that's a longer topic. You need to read about John Wheeler's Geons and realize everything (momentum too) only consists of compressed space and it will make sense. Momentum is the compression vector of the space that builds particles.