ABSTRACT
We now have all the tools needed to derive the equations governing the dynamics of the gravitational field. We expect such equations to be more complicated than the linear equations of the electromagnetic field. For example, electromagnetic waves are produced as a consequence of the motion of charged particles, but the energy and the momentum they carry are not a source of the electromagnetic field itself, and their contribution does not appear on the right-hand side of Maxwell’s equations. For the gravitational interaction the situation is different. The famous equation E = m c 2 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429491405/ca649d5c-f196-46ba-a559-62f17edd293c/content/math6_1.tif"/>
