Under the patronage of Prof. Dr. Gad El-Qady, President of the National Research Institute of Astronomical and Geophysical (NRIAG), the Astronomy Department , the Kottamia Astronomical Observatory (KAO), and the Center of Scientific Excellence in Astronomy and Space Sciences will organize a symposium on the occasion of the 100th anniversary of the founding of the International Astronomical Union and 50 years of space travel on Monday 29 July 2019 at 10AM In the hall of Prof. Mohamed Reda Madwar at NRIAG.