The second motion is the galaxy rotating, Greg.

But the first and most important motion is all matter catapulting away from the original location where matter first appeared, some 13.8 billion years ago. That is the "wall of the machine." The fastest singular motion of all matter in the Milky Way, going in one single direction, did not get diminished in all that time.

Our moving along in the circular motion of the Milky Way is therefore not the fastest, so you need to recognize the various parts of the model.

Anything moving in one and the same direction at the fastest speed possible is held together already by that singular direction of motion (and the slightest amount of gravity among all that matter will suffice to ensure it stays together, unless something interferes).

--

Have two space rockets fly from the Moon to Mars, lifting off at the same time at the same speed. Will they have to do much to attract one another? Not at all. They are in each other's vicinity the entire time. Little magnets can already do all the work to keep them together because they started out from the same reality and continued in that same reality in that same direction. They may end up circling one another.

Turn this into 5,000 rockets, and they will start circling a collective center without much effort.

Turn this into 1,000,000,000 celestial masses all going in the same direction in each other’s vicinity and the collective gravitational center will have quite the depression to it.

At the Exploratorium in San Francisco, a device showed how a circular motion of masses would indeed experience the center in a different manner than all other parts of the circular motion. Ask me about it, and I'll provide more information.