[zeroca]

Spinning as a regularity of whole universe 1

In order to show all three animations, I divided the post into three parts:
Before solving the task of Earth-Moon spinning on their axes and around each-other, let’s recall a little about the reason of spinning generally, or about the locomotive force (the motive) of spinning generally, i.e. spinning as regularity of universe, arisen at starting stage of the latter;
I.e. my own explanation of this mechanism:
1. Space and body (I consider both of them as processes but not as a rigid events, i.e. space – as permanent expansion, happening within time, and body – as permanent contraction happening within time, i.e. space as 3d-space-time and body – as 3d-body-time, i.e. as opposite events, opposite processes), i.e. first of them - permanent centrifugal expansion from some center up to some distance, and the second – permanent centripetal contraction to the same center.
I.e. Body with its adjacent space is a unity, which we can call space-body …

Animation below:
1. Permanent centrifugal expansion (continuing within time) from the center determines a permanent centripetal concentration of matter (I mean the matter, which is placed inside this particular expansion) to the same center.




Spinning as a regularity of whole universe 2
2. Permanent centripetal concentration results in increasing of press on the center of planet from all sides, i.e. the center of planet is found in different condition in comparison with other parts of planet, as it experiences press from all consisting matter of planet radially from all sides to it.
3. Increasing of press on the center of planet from all sides results in increasing of repulsive force from the center of planet radially to all sides according to the Newton's well-known law, which states:
"For every action, there is an equal and opposite reaction."



Spinning as a regularity of whole universe 3

4. I.e. permanent increasing of expansion results in permanent increasing of centrifugal repulsive force within bounds of planet, which results in spinning of body, i.e. spinning of unity, called space-body…
See animation below:

Conclusion:
To say briefly in a popular language, the rotation of planet is the mechanism, which frees the center of planet from press of all consisting parts of planet on it, i.e. the center of planet “frees itself” from the press of concentration of matter from all sides with help of mechanism of rotation, as acquiring of linear speed lessens centripetal press on the center, i.e. the (permanent) rotation is passive process, conditioned by opposite (permanent) process of expansion, which makes rotate the matter, placed within the "bounds" of this same expansion.