Hello Aspirant,

First of all you need to know the eligibility criteria of jee mains which are as follows -

• Candidates should pass from any recognised board or University.
• Candidates should opt for physics chemistry and mathematics as mandatory subjects in their class 12th.
• Candidates should secure a minimum of 75 percentage in their class 12th.

So to move into a cosmological career you need to have strong concepts in these three subjects but not necessarily need to give jee mains and advanced.