Earth's rotation theory and construction Zawraqi astrolabe

 Safaei Iraj

University of Kashan observatory , Kashan



Nearly a thousand years ago some scientists believed the rotation of the earth. One of these scientists was Aboosiyd Sejzy (Al-Sijzi). He made a different type of astrolabe called "Zawraqi astrolabe". The rotation of the Earth based on astronomical instrument was designed. In this article I describe it. I will make an "Zawraqi astrolabe" was designed by myself.


Presented by Safaei, Iraj; 4th National Astronomical research meeting, 29-30 December, 2010, Sistan & Baluchestan University, Zahedan, Iran.