al-Zij al-Sabi (The Sabian Zij)

"al-Zij al-Sabi" by al-Battani, an astronomical table (zij) on the calculation of the stars and the astronomy of the zodiac, and on the positions of the planets ⁴.

The book begins with the tabulation of the circle of the celestial sphere and the calculation of the chords of its arcs. It then treats the obliquity of the zodiac relative to the celestial equator, the rising points of the signs in different countries, knowing the latitudes of places by observation, the gnomon and the altitude, the meridian line, and the distances of the planets from the celestial equator and from one another ^{1 2 3}.

The text is taken from a manuscript which the publisher says is kept in the Escorial Library. It was edited and annotated by Carlo Nallino, and published by Byblion in 2005. The details of the original edition have not yet been verified ^{5 6}.