William Marsh Rice University, commonly known as Rice University, is a private research university in Houston, Texas. Its emphasis on education is demonstrated by a small student body and 6:1 student-faculty ratio, and it has been nationally recognized as a leading university for undergraduate teaching. Rice is noted for its applied science programs in the fields of artificial heart research, structural chemical analysis, signal processing, space science, and nanotechnology. The university has produced numerous prominent alumni, including more than two dozen Marshall Scholars and a dozen Rhodes Scholars. Given the university's close links to NASA, it has produced a significant number of astronauts and space scientists.