Chief of the Astronaut Office procedures, and selection and conduct of specific experiments for each flight. Since the Shuttle era, the Chief of the Astronaut Office often returns to active duty in the Office once their term is complete. The Chief is currently responsible for managing Astronaut Office resources and operations, and helps develop astronaut flight crew operation concepts and crew assignments for future spaceflight missions. Chief of the Astronaut Office The Chief of the Astronaut Office is the most senior leadership position for active astronauts at the National Aeronautics and Space Administration (NASA). The Chief Astronaut serves as head of the NASA Astronaut Corps
Chinese as a foreign language use of Westerners. Due to the status of Guangzhou as the only Chinese port open to foreign trade and exchange in the 1700s, Cantonese became the variety of Chinese that came into the most interaction with the Western world in early modern times. Foreign works on Chinese were largely centered around this variant until the opening up of other Chinese regions for commerce through unequal treaties, which exposed European scholars to a much larger number of Chinese varieties. In 1814, a chair of Chinese and Manchu was founded at the Collège de France, and Abel-Rémusat became the first Professor of