Similitude between the Earth’s nucleus and the Earth–Moon barycenter

Abstract

Being interested in problems which regard the Earth’s rotation around its axis, we made some attempts to find the limits of the Earth–Moon barycenter inside the Earth. We found that the Earth–Moon barycenter surrounds the Earth nucleus. We also noticed that when the angle between the Earth equator and the Moon’s orbit reaches its minimum value at 18.3°, the barycenter spiral with around 27 whirls surround only the inner core.