In this book you will witness the scientific studies discoveriesand/orinventions of Al-Khwarizmi who taught Europe the algorithm calculation method and the science of algebra.Al-Khwarizmi who discovered "Zero" and brought in the world of science is an important mathematician as well as a great astronomer.In the ninth century he was the director of the center for science and culture called "Baitul Hikmah" (House of Wisdom) which greatly influenced the scientific world.Al-Khwarizmi got two observatories established in both Baghdad and Syria and issued Ziyc-I Harizmi (TheCatalogue of Star of Al-Khwarizmi) the famous catalogue of stars by means of the labour of long years.How about setting out on an exciting time travel to get to know Pioneering Scientist Al-Khwarizmi better?