Shemseddin Mervezi (Turkmen: Şemseddin Merwezi), also known as Shams al-Dīn al-Marwazī[1] (1077 – c. 1139) was the court astronomer for the Seljuq sultan Ahmad Sanjar at Merv.
[2] Ýyldyzlar kitaby was published in the Turkmen language for the first time in 2006, having been prepared for publication using manuscripts stored in Istanbul and Vienna.
[2] Mervezi was born in 1077 near Merv, a centre of science and culture of that time, now modern Mary, Turkmenistan.
[2] Mervezi's Ýyldyzlar kitaby includes his own astronomical observations, as well as information about the night sky produced by his contemporaries.
It used accessible language to describe the behaviour of the stars and the planets, was one of first texts about astronomy.