Yes, the Persians were renowned astronomers as well, and incidentally Persia is one of those civs that you can take in pretty much any direction you want because they excelled at everything at some point in their long existence--culture, government, religion, science. But you don't have to look to Persia to acknowledge the important scientific advancements made by the Abbasid Caliphate.
Here is a snippet of an excellent article on the subject:
Science in the Islamic world
Rational thought in the Muslim world developed during the reign of liberal Muslim rulers of the Abbasid dynasty. However it was after the rise of scholars like Al-Ghazali that all scientific reasoning came to an end in the 13th century. As we remain enamored by our past achievements in the sciences, we forget that there is very little “original” we as Muslims can celebrate and be proud of.
It was during the reign of the early Abbasid caliphs, particularly Mamun-ur-Rashid (around 813 CE) that in his Dar-ul-Hikmah (the house of wisdom) in Baghdad, Muslim scholars would begin translating the classic Greek works, primarily toeing the Aristotelian tradition. In addition, they were heavily relying on Persian and Indian sources. They also penned huge commentaries on works by Greek philosophers. However, the Muslim translators were small in number and were primarily driven by curiosity. More than ninety nine percent Arabic translations of works of Greek philosophers were done by either Christian or Jewish scholars. It is interesting to note that Islamic astronomy, based on Ptolemy’s system was geocentric. Algebra was originally a Greek discipline and ‘Arabic’ numbers were actually Indian.
[N.S Rajaram: Indians invented algebra, calling it bija-ganita. Greeks considered some special cases in number theory like Diophantine Equations, also known to the Indians. The cumbersome letter-based notation (like the later Roman numerals) did not lend itself to problems in algebra. The major Greek contributions were the concept of proof (known also to Indians) and above all the axiomatic method at which they excelled. The Arabs themselves never denied their indebtedness to the Hindus in astronomy, medicine and mathematics. They called their numbers ‘Hindu numerals’. As noted in the Editor’s Introduction, much of this took place in pre-Islamic Iran, especially under Khusro I.]
Most of these works were available to the West during 12th century when the first renaissance was taking place. Although Western scholars did travel to Spain to study Arabic versions of classical Greek thought, they soon found out that better versions of original texts in Greek were also available in the libraries of the ancient Greek city of Byzantium….
https://www.jihadwatch.org/2015/07/the-myth-of-islamic-science