I want to know the answer to the following question:
What field did Muḥammad ibn Jābir al-Ḥarrānī al-Battānī contribute to?
All the background I'm provided with is that "Heliocentric theories were also discussed by several other Muslim astronomers such as Al-Biruni, Al-Sijzi, Qotb al-Din Shirazi, and Najm al-Dīn al-Qazwīnī al-Kātibī.". Is that enough to answer the question?
Answer: no