The cosmic level deals with the mechanics of the very large, like planets, solar systems, the galaxy, and beyond. This section’s treatment of these items relies mainly on the Newtonian gravitational force. In all of Newtonian mechanics, time plays a crucial role. How does a system evolve from one point in time to another? The first area of investigation is to look at how time transforms from exemplar to privo space in a gravitational field when the clock is stationary (or moving at a uniform velocity) and then when the clock is accelerating relative to an observer in exemplar space.