To find an object's swing style, which later was developed into a pendulum clock, timer and all that he can develop a new, more powerful telescope. Make the knowledge of astronomy is progress.
The swing style of found objects. Which later developed into the timer. And pendulum clocks Moreover, he can develop a more powerful telescope. Astronomers have made academic progress.
The characteristics of swing of the objects. Which later developed into the timer, and the pendulum clock. The telescope he can develop more efficient. The technical progress in astronomy.