Nevertheless , these changes are exceedingly small compared to the total angular momenta of the system ( which is conserved despite these effects , ignoring the even much tinier amounts of angular momentum ejected in material and gravitational waves leaving the Solar System , and the extremely tiny torques exerted on the Solar System by other stars , etc. ) , and for almost all purposes the plane defined on orbits alone can be considered invariable when working in Newtonian dynamics .
For almost all purposes the plane can be considered invariable when working in Newtonian dynamics .