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Ahmed Abulwfa

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National Institute of Astronomical and Geophysical Research  Department of Sun and Space Research.
The astronomical guide for the Hijri year 1439 AH corresponding to the year 20172018 AD. 
This guide includes astronomical calculations to explore the crescent moon.
Prepared by: Dr. Mohamed Gharib Rashed Abu Amera.
Reviewed by: Prof. Rabab Helal Abdel Hamid.
Supervision: Prof. Hatem Hamdy Odeh, President of the Institute.


Astronomical guide

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