what is spatial rotation?

Answer 1

Basically we exist and move in a three dimensional spacial volume.
Hence we we talk about space we are talking about a substance existing in a three dimensional volume at rest(no motion). That means we move in space but space is only relative to our motion, and not the other way around.
The power that exists in the substance of space is what makes things move and when two powers act at right angle on a mass structure, the result is rotation.
When a mass rotates at near the speed of light magnetism is created. This is something that needed to be addressed in the relativity theories.
Hence we can consider the twisting of space as a corkscrew rotation forming magnetism.

Very intuitive question.

Answer 2

It is rotation with reference to the distant stars & galaxies (hence the term spatial) which appear to us essentially motionless. As opposed to rotation relative to something already turning, like the earth..........

Answer 3

It's a system of equations formed to represent an object which is moving and rotating, the equations are called quaternations

Answer 4

Good question.