It tells us many things abbout the moon, sun, and stars. For example, islamic

astronomy taught us a lot about lunar positioning.

Medicine, Astronomy, Math, & Science.

They contributed to algebra, astrology and to the field of medicine. Also, major contributions to astronomy and philosophy.

They are many in astronomy, medicine, physics, mathematics, biology, .... refer to related question and link below.

Chinese astronomers during the Dark Ages made advancements in observational astronomy, such as developing a sophisticated system of recording star positions and predicting celestial events. Islamic astronomers translated and built upon ancient Greek and Indian knowledge, contributing to advancements in trigonometry, astrolabes, and the development of the scientific method in astronomy. Both cultures played important roles in preserving and expanding astronomical knowledge during this period.