ИСТИНА

Dynamically, the body of a certain shape seeks to change its shape to the caustic of this form (in the absence or disparaging small forces of interaction). In fact, this effect can be observed for a liquid in weightlessness, which continuously changes shape, trying to get closer to the caustic generated by this dynamically changing form; only the forces counteracting compression do not allow this to happen. The fact that the form with an almost spherical border has the caustic set concentrated near the approximate center of this form. The resulting form constantly changes chasing caustics. This, of course, occurs due to the property of incompressibility of fluid. There are, of course, cases when the form of liquid can and does change to the approximate position of the caustic of its border. For gases, the form eventually begins to take the form of caustics (or caustics of lows (minima), or caustics of highs (maxima). This explains the evolution of Elliptical (ellipsoid-shaped) galaxies, as younger ones, to Spiral and to Spiral with a jumper (Spiral barred) galaxies. It also explains the existence of galaxies with a polar ring. In short, caustics is the law of evolution of forms.