Hi, Cem,
This one we call in Turkish Usturlab. I suspect it is of Arabic origin. Is Usturlâb tأُصْطُرْلاَبٌ the original word for it?
The word in English and many other languages for this device is
astrolabe. This device is different from the
mariner's astrolabe (which we can think of, not too accurately, as a "mobile" version).
There is disagreement as to the origin of the word. A common and credible etymology is that the term comes from the Greek ἀστρολάβος (
astrolabos), "star-taker".
In medieval times it was called in parts of the Islamic empire (transliterated of course)
asturlab, certainly a cognate with the Turkish.
One source suggests that the term comes from the Persian (again, transliterated)
sitara yab, meaning "taker of the stars").
Best regards,
Doug