Rigid body dynamics from the Euler equations to the spacecraft attitude control in the works of scientists from Saint Petersburg State University. Part 4

This article is a continuation of the survey dedicated to the 300th anniversary of Saint Petersburg State University and is an attempt to analyze the scientific achievements of the St.Petersburg School of Mechanics in the field of rigid body dynamics. This, the fourth part of the review, is devoted to studies of the dynamics of the uncontrolled motion of a charged rigid body in the gravitational and magnetic fields of the Earth.