A doctoral degree is the usual educational requirement to become an astronomer, since most of the work tends to be related to research and development.Those who opt for this field, should pass their plus two examination under the science stream, specially in physics and maths. Thereafter pursue graduation in Physics with Mathematics as a subsidiary subject and after graduation take a master's degree in Physics or Astronomy. After the successful completion of MSc, you can do specialization in astronomy leading to Ph. D.. For details about Astronomy/Astronaut. click here