The universe is not spinning. It is pulsating. The fundamental particle of matter moves along a helical path having a circular axis, and thus returns back. It takes 51.4 billion years for that. The universe, which is the final product of the integration of such particles, takes the same time for one pulsation.

Electromagnetic radiations are streams of pairs of fundamental particles. As the mass of the pair is double, the radius of the circular path is one-fourth, and so light takes only 12.85 billion years for one revolution.

The above value was obtained as follows: First, a three dimensional wave pattern was visualized for electromagnetic radiations; it was followed by models for the internal structures of electron and neutron. The radiation having the highest energy will have a mass of neutron (as per my model). So from the known values such as, the mass of neutron, planks constant and speed of light, the physical constants of the fundamental particle were deduced using my models.