The fact that the astrolabe was developed in the muslim empire implies that europeans had more advanced technology. europeans had did not make use of new knowledge. the muslim empire was technologically advanced. the world outside of europe was undeveloped.

The answer is: the Muslim empire was technologically advanced.

During the times of the medieval Islamic world (7th century to 14th century), Muslim astronomers refined and further developed the earlier Greek invention called the astrolabe, which is an instrument that measures the altitude of a celestial body above the horizon. This development was used for astronomical studies and for navigation purposes, which reveals, as a good example, how advanced Muslim thought was and still is.

an expansion is one of two basic business cycle phases; the other is contraction. the transition from expansion to contraction is a peak, and the changeover from contraction to expansion is a trough.