Astronomer

Becoming an astronaut is strenuous and involves intense physical and mental training. They are expected to be knowledgeable about commanding a space shuttle and be adept at managing problems faced by the space shuttle and/or its various components. A vital responsibility includes ensuring the safety of all crew members and the spacecraft. Astronauts also need to be alert at all times, about the situation within and outside the spacecraft. Regular maintenance operations and reporting to the base station is an elemental part of the job. Exercise is essential for maintaining stamina as space walks can sometimes last for more than 7 hours. Physical and mental fitness is mandatory because the smallest of details need to be recorded as anything can prove to be fatal. Becoming an Astronaut while living anywhere in the world is a big call. The dream becomes a reality after a continuous and lifelong commitment to the dream. Indians need to start early. Right after the board exams in the 10th standard, students need to take up the core Science disciplines including Physics, Chemistry and Mathematics, following which they need to apply for a Bachelors Degree from one of the highly acclaimed universities like the IITs and IISC. The degree can be focused on Physics, Chemistry, Mathematics, Biology, Aerospace Engineering or Physical Sciences. Post graduation, aspirants need to complete a Ph.D. in Astrophysics, Geophysics or Metaphysics. At this point, the candidate will get to specialize in a certain stream. Once the Ph.D. is complete, aspirants need to take an entrance test for which there are two options
Clearing the Joint Entrance Exam help by the IITs through which one can join ISRO
Clearing the entrance exam held by NASA for the recruitment of scientist and astronaut.

Hi Deepanshi,
I am having something for you, go through it, it will help you. In India, you will have to start focusing on your career once you pass 10th grade. One should choose Physics, Chemistry and Mathematics as core subjects in 12th. After you are done with 12th grade and you have gotten good grades, you need to focus on a good Bachelors degree from a recognised university. One could choose a course in Physics, Chemistry, Maths, Biology, or Aerospace Engineering. To be able to get a post graduation degree and a doctorate, you need to do well in your undergraduate degree. Post graduation and doctorate will basically be specialisation in your stream. After you are done with graduation, you can sit for the exam, which is held by NASA for the recruitment of scientists and astronauts. Or in order to join ISRO, one needs to clear the Joint Entrance Exam which is held by the IITs. And in order to be a mission specialist, you will need 3 years of related and responsible experience. There are a couple of qualities and skills that a person needs to possess in order to make sure he can think of becoming an astronaut, some of them are-
1) You need to be physically fit, there are examinations, mentally strong and should have great stamina. You should qualify the criterion of height, a particular level of height is required for people to become an astronaut.
2) You should possess great mathematical skills, and I am not talking about addition, multiplication etc. You should have good communication skills, you must be good at English because there are very high chances that people you will be working with will not even be from your own country.
3) You should have a good academic career and team spirit because all the space missions are done in teams, and you should be able to work under high pressure and in the cramped environment.

Aerospace engineering is broadly divided into two types of engineering- aeronautical engineering and astronautical engineering
What all can I do after Aeronautical Engineering?
Maintenance of Aircraft - Aerospace Engineers test new aerodynamic and aviation systems and maintain them.
Aircraft Designer - Aerospace Engineers specializing in this field deal with designing, constructing, and testing aircraft, missiles, and spacecrafts. They may conduct basic and applied research to evaluate adaptability of materials and equipment to aircraft design and manufacture.Aviation Engineer- Aerospace engineers in this field deal with the airport design, aircraft navigation technologies and aerodrome planning.
Defence - Aeronautical engineers in this field deal with creation, maintenance and deployment of defence aircrafts such as fighter jets, choppers, bombers, etc.Also, the job requires being able to handle such aircraft at necessary times.
Where all can I work? As everyone here mentioned right, you can work in government sector with ISRO, DRDO, HAL, etc. And then we can look at private companies such as L & T, Godrej and Boyce aerospace, Boeing, Airbus, Mahindra, etc. You can also go for Indian air force and Indian Navy.