In other words, 'twas the Greeks, not the Arabs, who really invented the astrolabe.
This article mentions they accounted for the ELIPTICAL ORBIT OF THE MOON!
This beats Kepler!
It just adds to the fact that the arab world pretty much was a middle man book seller and not much more than that.
The Arabs didn't discover diddley. They simply took over the knowledge of the people's they conquered.