Ibn Khaldun or Ibn Khaldoun (oruko lekunrere, , , (May 27, 1332 AD/732 AH - March 19, 1406 AD/808 AH) je ara agbegbe Ariwa Afirika onimopupoAwon itokasi Igbesiaye.. 
It would have to withstand frequent passages from Direct sunlight into the darkness of earth's shadow, which would cause major changes in temperature, while being kẹ́tẹ́kẹ́tẹ́ enough to allow extremely accurate pointing of the sínúscope.. 