York University (French: Université York) is a public research university in Toronto, Ontario, Canada. It is Canadas third-largest university. York University has approximately 53,000 students, 7,000 faculty and staff, and 295,000 alumni worldwide. It has eleven faculties, including the Faculty of Liberal Arts & Professional Studies, Faculty of Science, Lassonde School of Engineering, Schulich School of Business, Osgoode Hall Law School, Glendon College, Faculty of Education, Faculty of Health, Faculty of Environmental Studies, Faculty of Graduate Studies, the School of the Arts, Media, Performance and Design (formerly the Faculty of Fine Arts), and 28 research centres. York University participates in the Canadian Space Program and is home to Canadas only space engineering program. The Faculty of Science and Lassonde School of Engineering are Canadas primary research facility into Martian exploration, and have designed several space research instruments and applications currently used by NASA. York has pioneered several PhD programs in Canada, including womens studies. The School of Social Work is recognized as having one of the most socially responsive programs in the country. Yorks psychology program is the largest in North America. York Universitys business school and law school have continuously and consistently been ranked among the top schools in Canada and the world.