Dear Samyak, to become an aerospace engineering, you should pass your plus two examination under the science stream, with Physics, Chemistry and Mathematics and must have a fairly high percentage of marks in the aggregate. One can take admission in B.Tech / B.E in aerospace engineering, after passing the qualifying exam JEE (Joint Entrance Exam) conducted by the IIT. For more details regarding aerospace engineering, you can check out this link click here . Wish you all the best.