The main objective of this 3rd Cycle of Studies in Astronomy is to train future astronomers and researchers. The Program is open both to high quality Portuguese and foreign students who have completed a 2nd Cycle in Astronomy, Physics, Mathematics or similar fields of science. Students who have completed a 1st Cycle and have a particularly relevant CV may also be accepted in the Program. Furthermore, due to the increasingly technological component of the recent astronomy projects, we also aim at attracting students with a diversified background, namely in technology and engineering, systems and control, or informatics, amongst other areas. Astronomy offers them unique and exciting opportunities for further training.