Purdue University's Master of Science in Aeronautics and Astronautics, Indian students should have a bachelor's degree in aerospace, mechanical, electrical, or related engineering fields, with a minimum GPA of 3.0 out of 4.0. A strong foundation in mathematics and physics is essential. While the GRE is optional, submitting scores can strengthen your application, especially if your GPA is below 3.2 or if you have limited industry experience.