Astronomer

How to become an astronaut? An astronaut is someone who is giving training by the space flight programme to work as the pilots. Qualifying exam:
Bachelor's degree in biological science, engineering, mathematics or physical science from a recognised university. They need to obtain any one of the following degrees from renowned institutes like IISC or IIT, Ph.D (Astrophysics)
Ph.D (Geophysics)
Ph.D (metaphysics)
After graduation, candidates can appear for the entrance exam which is held by the NASA for the recruitment of scientists, Astronauts etc. You may also find employment in ISRO
There are many openings in ISRO which is conducted for the recruitment of scientists, engineers. In order to join ISRO, you need to clear joint entrance exam by IIT's. Eligibility to apply:
Should be a citizen of India
You should be atleast 21 years of age by the time you join. Age relaxation is there for SC/ST candidates. Need to be graduate from a recognised university or board. Regards.

Dear Baby!
Currently, you are on the wrong path if you are willing to be astronaut and working in a IT company. The more sophisticated way is to continue your studies.
(1) Do your Master in Aerospace Engineering from Indian Institute of Space Science & Technology, Kerala.
(2) Hence after you MUST have to do Ph.D. in that particular subject from Indian Institute of Science, Bangalore. (*I hope you know why I am mentioning the name of specially these institution).
You know that Astronaut are not like regular employee for space organisation. They are specially build person hired (or trained) for a particular mission. So, don't think that ISRO or NASA or ESA are always recruit Astronauts. They don't do so, unless they plans a manned mission for space region or for ISS. Another thing I would like to say is about your physical fitness. You have to be 100% fit not just from your physic but also from your mind (mental stability). (#) Astronaut is not a position. So, there is no special degree for that. Your Steller academic background, your physical, mental, emotional, biological stability/fitness and the hardcore training will help you to be astronaut. (#) Be in contact with ISRO and its operations. B.Tech in CS is not bad but not a wise choice for Space Science. But this may helps you in Rocket Simulation.
Answer is quite long but I hope this helps.
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Good Luck.

Hi Mehul, The conventional way is to go for Bachelors in physics, followed by a Masters and a PhD in physics. But some people (including me) are doing PhD after a Bachelors in engineering. One needs very good understanding of physics and maths as a prerequisite. In the meanwhile, many leading research institutes like IUCAA, Pune organize short term Schools in astrophysics for school students, which should be used by you to get a deeper glimpse of this field.
Cosmologists spend most of their time worrying about the different theories about the origin and fate of the Universe. Astrophysicts read a lot of scientific papers, attend research Conferences throughout the year. And contrary to common perception, most researchers work in collaborations with various people cutting across institutes and countries.
All the best.