The Pivot theory postulates that our Universe is an isolated island located somewhere in the infinite vacuum space. It is composed of two parts: a massive spinning neutron star designated the Pivot and a ring-shaped visible Universe that orbits this Pivot. The Pivot, from the quantum physics point of view, is composed of neutrons and antineutron packed at the highest possible density in the Universe. From the GR point of view, the Pivot is described as a Kerr black hole. Therefore, the ring-shaped visible Universe must reside outside the event horizon of the Pivot. The Pivot theory postulates that our Universe started as a spinning primeval nucleus. This primeval nucleus accumulated mass from the vacuum space energy. The growth of this nucleus stopped when the velocity on its equator surface reached the speed of light and then exploded into two distinct parts: The Pivot and a ring of the visible Universe. The theory is verified against known cosmological observations. For example, the flat rotation curve in Spiral Galaxies, the Spiral shape of Galaxies, the high redshift of Galaxies, Michelson-Morley experiment, Sagnac effect, CMB, Nucleosynthesis, and other observations. Finally, the theory explains two profound issues in physics: the origin of gravity and the conundrum of matter-antimatter. Keywords: Universe structure, frame-dragging, Blackhole, Neutron star, QM, GR, gravitational constant, gravitational z shift, matter-antimatter.