Who did Vasco de Balboa sailed for

In 1513, while leading an expedition in search of gold, he sighted the Pacific Ocean. Balboa claimed the ocean and all of its shores for Spain, opening the way for later Spanish exploration and conquest along the western coast of South America.

The first major Muslim work of astronomy was Zij al-Sindh by al-Khwarizmi in 830. The work contains tables for the movements of the sun, the moon and the five planets known at the time. The work is significant as it introduced Ptolemaic concepts into Islamic sciences.