Change of motion changes Gamma time. Gamma energy resists these
changes in motion/time. Mass or gamma energy undergoing a change of
motion/time experiences a second form of gravity; accelerated/
decelerated motion gravity. Einstein's Equivalence Principle means
there are two forms of gravity the gravitational fied and the
accelerated/decelerated frame.

Mitch Raemsch Twice Nobel Laureate 2008