Editing Stellar dynamics (section)

=== Key concepts ===
While both the equations of motion and Poisson Equation can also take on non-spherical forms, depending on the coordinate system and the symmetry of the physical system, the essence is the same: 
The motions of stars in a [[galaxy]] or in a [[globular cluster]] are principally determined by the average distribution of the other, distant stars. The infrequent stellar encounters involve processes such as relaxation, [[Mass segregation (astronomy)|mass segregation]], [[tidal force]]s, and [[dynamical friction]] that influence the trajectories of the system's members.<ref>{{Cite journal|last1=de Vita| first1=Ruggero|last2=Trenti|first2=Michele|last3=MacLeod|first3=Morgan|date=2019-06-01|title=Correlation between mass segregation and structural concentration in relaxed stellar clusters|journal=Monthly Notices of the Royal Astronomical Society|  volume=485|issue=4|pages=5752–5760 |doi=10.1093/mnras/stz815 | doi-access=free| arxiv=1903.07619 | issn=0035-8711}}</ref>