Pursuing an engineering degree despite family worries

my question is regarding the field of aeronautical engineering. i am 17 years old and giving my final class 12th exams next month. my deepest desire is to pursue aeronautical engineering and serve at ISRO or the indian air force. since i am a girl from a protective family, my family is concerned about my choices. although they wish to support me in whatever i do they do not want to send me to other cities for higher studies. i am passionate about aeronautical/aerospace engineering and i frankly dont see myself doing anything else. can u please guide me how to go about pursuing higher education and my dream?
posted by nishka , navi mumbai, india on February 11, 2013