B.Tech

Hi Keerti,
Yes, you can join an autonomous institute.
But before that you must know the difference.
There are two types of colleges. (1) Affiliated and (2) Autonomous. The first type are affiliated to some or the other university. They have to follow the syllabus prescribed by the uni and also the all the norms & regulations etc. The admissions are decided centrally by the University. The exams too are conducted by the university. This means all the colleges affiliated to the same university will have same question papers and will be evaluated by same people with same criteria.
Autonomous colleges on the other hand are granted freedom and in some or all the matters. They can have their own syllabus, evaluation patterns etc. It is not easy to get the status of an autonomous college, Currently, any affiliated college which has been accredited by National Assessment and Accreditation council of India (NAAC) for three times with a higher grade. This assessment is five yearly. The college can apply for autonomous status and U.G.C. may or may not grant it autonomy.

Hi Upendra, ISRO yearly recruits fresh graduates with B.E. / B.Tech. Through its central recruitment system called ICRB (ISRO Central Recruitment Board) in various stream namely Mechanical, Civil, Electronics and Computer Science. Candidates with aggregate of more than 65% marks are eligible for the job. Applicants are required to take a written exam consisting of 80 multiple choice questions related to your stream. On the basis of this exam, the selected applicants are then called for an interview which decides the final selection of candidates for the post of Scientist/ Engineer SC. You can seek admission into IIST in Thiruvananthapuram, Kerala which is one of the finest space Science institute in India and after graduating from there you will be probably get a job in ISRO or maybe some other space research organisation. To get into IIST, you must be able to qualify JEE ADVANCE, nonetheless admission criteria is based upon JEE Mains. As far as I know, you must be able to secure a rank under 5000 in Mains to get admitted there. Then an admission form is needed to be filled after the ADVANCED examination which you will find in IIST website. You'll be given two choices of branch for your B.Tech study namely avionics and aerospace engineering and even a number of M. S courses regarding astrophysics, etc. Are offered over there.