Design and Construction of the Zawraqi Astrlabe by Iraj Safaei
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. Mr Iraj Safaei was make an "Zawraqi astrolabe" was designed.