The Lorentz invariance of characteristics of a moving body is considered. Each characteristic is taken as an independent system that is in unity with the others. Algebraic variants of the unity of independent systems are presented. A geometrical analysis of the description of the unity of independent systems is performed. The emergence of a 3-dimensional Nature by the unity of independent systems is shown. The duality of the physical vacuum (medium and void) is explained by its two-component nature. The question of the origin of the duration of an event by the motion of the present is considered. The analysis of the dimensionality of the velocity of time motion is made. On the basis of the differences, in the motion of matter in time and in space, the conclusion of the abstractness of time as the duration of an event and the reality of only the present (the moment "now") is obtained. The abstractness of the concept of time, allows in the duration of an event, to choose any moment as a point of reference. A variant of the present, as a period of transformation of the future into the past, is proposed. The sum of the transformation periods creates the duration of the event. It is concluded that time travel is impossible. The analysis of the effects arising in the matter while moving in time is made. A variant of verification of the presented conclusions is offered.