That was a vertex. Because after awhile, events appear to teach familiar lessons. The circumstances may be different, but the rules they illustrate are the same. Having the principles close into circles, not in time but in terms of their static meanings, is what gives rise to the image of networks of great circles intersecting with one another. The image is special case of course.
Any picture is.
Continuing with the angle versus frequency distinction, synergetics attaches the concepts of gravitiation versus radiation. The link to Newton and mass-interattraction is preserved, but then the word is launched into semantic space with a completely new set of rules. Gravity of the kind we are familiar with is only for objects in critical proximity. The unpredictability of precessional motion given mass-interattraction is more conventionally described as the inability of Newtonian mechanics to accommodate all the dynamics of a relativistic universe. Rather, in order to satisfy multiple conservation laws, pulling against gravity will result in changes among several parameters, some of which may leverage others.