Harsh, the colleges can be ranked on the basis of various parameters like fees, ambience, curriculum, faculty, infrastructure, placements etc. Here is a list of few of the best colleges for pursuing aerospace engineering in India:--

IIT BOMBAY

RV COLLEGE OF ENGINEERING, BANGALORE

SRM INSTITUTE OF SCIENCE AND TECHNOLOGY, CHENNAI

IIT MADRAS

IIEST, SHIBPUR

MSU, VADODARA

IISST, TRIVANDRUM

IIT KHARAGPUR

BIT MESRA

CHANDIGARH UNIVERSITY

PUNJAB ENGINEERING COLLEGE, CHANDIGARH

IIT KANPUR

MADRAS INSTITUTE OF TECHNOLOGY,. CHENNAI

I hope this helps you in choosing the right college for pursuing your interests.