Aerospace is an upcoming branch of the future. 

Aerospace engineering focuses in designing, construction, development, testing and maintenance of commercial and military aircrafts and spacecrafts.

Undergraduate courses: Bachelor of Technology (B.Tech) degree of four year duration.

Master courses: Master of Aerospace Engineering (MAE), degree of three years duration.

Master of Science in Aeronautics & Astronautics

M. Sc. Aerospace Engineering

Ph D in Aerospace Engineering

For bachelor courses, students must have passed 12th with PCM group and for master courses, students must hold a bachelor degree in the related field.

In India, many top colleges & universities offers various courses to pursue Aerospace Engineering:

IIT Kanpur

IIT Kharagpur

IIT Bombay

Indian Institute of Science

University of Petroleum and Energy Studies

Hindustan University

These are some of the recruiters of Aerospace engineering - 

Hindustan Aeronautics Limited (HAL)

Defense Research and Development Laboratories (DRDO)

Indian Space Research Organization (ISRO)

Civil Aviation Department

Air India

India Space Research Organization (ISRO)

Tata Advanved Systems

Mahindra Aerospace

Taneja Aerospace

L&T

Samtel Avionics

Pawan Hans Helicopters

Aeronautical Development Agency (ADA)

Aeronautical Development Establishment (ADE)

National Aerospace Laboratories (NAL) 

All the best....