Hello everyone. I have a challenge that has been bothering me and i would welcome any advice i can get right now. I have a BSc in Industrial Physics with applied Geophysics option. The problem is i dont know have a full knowledge of university physics and mathematics...am not even sure of my calculus but i love astronomy...it had always been my dream to be an astrophysicist....but i dont have the sufficient knowledge of university maths or physics to even attempt the physics GRE. the reason is that my foundations where not treated properly...in first year and i just had to cram my way through just for the grades (and i took some courses for granted) so i have scrappy knowledge of everything. Right now i am doing Matrices in Linear algebra...i dont know complex variables...i dont know differential equations, i have a scrappy knowledge in calculus...i dont know taylor series...fourier series...and all the advanced maths course from 2nd year up. As for physics..i dont know classical mechanics...i have a little knowledge of quantum...and absolutely nothing on Electrodynamics. So the question is can i still cover all these before the next graduate school entrance year and how long does it take to cover all these...should i start all over again as an undergraduate...or should i just forget about being an astrophysicist. i really love astrophysics...i read any publications i can get my hands on the latest in the subject..but i dont have the knowledge to understand them. So pls, is it too late for me???..