The Southern Celestial Rotation refers to the anti-rotation of the stars observed in the southern regions of the earth.
P-Brane explains the counter-rotation of the stars as a consequence of perspective. The author uses the sun's crepuscular rays as an example for how motion and perspective can seem to cause anti-rotations in two different directions, much like how spinning in the chair and looking up and down can cause the appearance of two different rotations in different directions.
According to P-Brane's explanation the observer is seeing a wide range of stars squished into a small area by perspective. Rotation appears as a mirrored anti-rotation due to opposite converging perspective elements.
Q. How can two people on opposite sides of the earth both see the South Pole Stars simultaneously?
A. Since those areas are many hours apart from each other, when it is night or dusk for one area it may be day or dawn for the other. It is questioned whether it is the case that those observers see the same stars simultaneously.
Under the Bi-Polar Model the anti-rotation in the south is explained with the existence of a South Pole and a rotating southern celestial system above it.
See the Bi-Polar Model