Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ghost.
In some sense yes, in both the field you observe and collect data to study celestial bodies using physics, chemistry and all & as far as going to outer space is concerned, my friend you are already on a spaceship roaming infinite cosmos, cherish this fact. and if you wanna be on a subspace ship of some organization then have to hold a degree having specialization in PHYSICS, CHEMISTRY or BIOLOGY. you have to gain minimum 1000 hours flying experience and have to clear nasa's physical test, having all this things can make you eligible for NASA astronaut programs. for more details you can see some you tube videos by NASA's astronauts. Happy journey to space, Wishes.