The virial theorem states that the total kinetic energy of the objects in a
spherical, self-gravitating, stable assembly is equal to negative 1/2 times the total gravitational potential energy, if the objects can be assumed to have equal masses.
... 1864. On May 10, 1873, at his request, he was permitted to travel to Molokai to help the lepers who had virtually nothing to keep them warm or fed. After twelve years of ...