Mohammed al-Rudani
Mohammed al-Rudani was an astronomer born in Taroudannt, Morocco.
Al-Rudani spent most of his life in Ottoman territories. He is especially well known for the invention of a spherical device
into which another sphere with a different axis was placed. This second sphere was divided into two parts in which the zodiacal signs with their sections and regions were drawn. Al-Rudānī wrote a book describing it, Al Nāfia fī amal al jāmia. Rudānī's best known work is Bahja al ullāb fī al amal bi l as urlāb, a book on how to make and use an astrolabe.
