Potential energy is a scalar and kinetic energy is a vector energy. e.g.W= -mGM/r + cmV = -mu/r + cP where the potential energy is -mu/r and the vector/kinetic energy is cmV.The kinetic energy is the energy due to motion, cmV. This is the so-called "Dark Energy", hidden in plain sight. Physicist are blinded to "Dark Energy" because they see energy as only a scalar quantity, not a vector energy.The "anti-gravity effect' of Dark Energy is Dev.cP = - cp/r cos(PR) called the Divergence of cP. The minus sign indicates the anti-gravity force, the centrifugal force, the center fleeing force..The gravity force is d(-mu/r)/dr = mu/r^2= vp/r, the centripetal force, center seeking force.Energy is both a scalar and a vector quantity, a Boson and a Fermion, in short energy is a Quaternion quantity, a four dimensional division Algebra.