Notable alumni University of Sydney alumni have made significant contributions to both Australia and the world for the past years. Notable alumni of Sydney include eight prime ministers, the most of any university, three chief justices of the High Court, four federal opposition leaders, two governors-general, nine federal attorneys-general, 13 premiers of New South Wales including incumbent Premier Dominic Perrottet and 20 justices of the High Court—more than any other law school in Australia. The faculty has also produced 24 Rhodes Scholars and several Gates Scholars. Internationally, alumni of Sydney Law School include the third president of the United Nations General Assembly and a president of the International Court of Justice (in each case, the only Australians to date to hold such positions). The University of Sydney is associated with five Nobel laureates: in chemistry John Cornforth (alumnus; the only Nobel Laureate born in New South Wales) and Robert Robinson (staff); in economics, John Harsanyi (alumnus); and in physiology or medicine, John Eccles and Bernard Katz (both staff). The School of Physics has played an important role in the development of radio astronomy in particular: Ruby Payne-Scott conducted the first interferometric observations in radio astronomy with the sea-cliff interferometer at Dover Heights; alumnus Ron Bracewell proposed the nulling interferometer to image extrasolar planets, made contributions to the theory of the Fourier Transform and X-ray tomography, and proposed the idea of the Bracewell probe in SETI; and alumnus Bernard Mills led the construction of the Mills Cross Telescope and Molonglo Observatory Synthesis Telescope in the ACT. School of Physics alumnus and Crafoord Laureate Edwin Salpeter discovered the form of the initial mass function of stars, the importance of beryllium-8 in stellar nuclear fusion, and independently with Yakov Zel'dovich proposed the black hole accretion disk model of active galactic nuclei. The Apollo 14 Mission Scientist Philip K. Chapman and the first Australian-born astronaut to fly in space Paul Scully-Power are both alumni of the university. Chaos theory pioneer and Crafoord Laureate Robert May is an alumnus of and former professor at the School of Physics, best known for his exploration of the logistic map bifurcations. In the performing arts, notable alumni include soprano Joan Sutherland; Shakespearean actor John Bell actor, producer and director Dolph Lundgren;and Bahraini–Sri Lankan actress Jacqueline Fernandez. In international politics, notable alumni include former chief minister of Uttar Pradesh, Akhilesh Yadav and premier of British Columbia, John Horgan. In