In 1984, the University of Porto started a program for the first degree in astronomy in a Portuguese university. Jointly offered by the Physics and Applied Mathematics Departments at the School of Sciences, the degree is strongly marked by the interdisciplinary character essential for the teaching of modern astronomy. It includes 37 per cent in physics, 32 per cent in mathematics, 25 per cent in astronomy, and 6 per cent in chemistry, geology, mathematics, or physics. Its structure in course units comprises: