تأثير حقل جاذبية المجرة على تطور مسارات المذنباتالحقيقية الشبيهة بالقطع المكافئ

The effect of galactic perturbation on nearly–parabolic cemetery orbits is examined via numerical integrations. The galactic field is an important factor in the evolution of comet orbits. The observed distribution of perihelia and semi major axes indicates that galactic effects have been active.