Celestial Mechanic: The theory is about conversion of pre-universe primordial matter into the matter of the universe, occurring at the speed of light in a direction away from its start point (now the center of the universe), and decelerating thereafter. There is no "dark energy" and deceleration is by transfering of linear momentum to angular momentum. The observable universe is rampid with angular momentum. If you cannot afford to purchase the book or download a <$5 electronic copy, send me a personal email and I will send you a complementary copy.