Why do galaxies appear flat?
Answers
Input: Gravity is (at least, seems to be) isotropic from its force law (Newtonian gravity). It should show no directional preferences from the form of force vector F⃗ =GM(r1)m(r2)(r1→−r2→)2r12^. The Einstein gravity also does not show directional dependence at least microscopically.
Input: Gravity is (at least, seems to be) isotropic from its force law (Newtonian gravity). It should show no directional preferences from the form of force vector F⃗ =GM(r1)m(r2)(r1→−r2→)2r12^. The Einstein gravity also does not show directional dependence at least microscopically.If the gravity attracts massive objects together isotropically, and the macroscopic space dimension is 3-dimensional, it seems to be natural to have a spherical shape of massive objects gather together. Such as the globular clusters, or GC, are roughly spherical groupings Star cluster