Hi!I am doing my extended essay in math and specifically on noneuclidean geometry and how is it applied in calculating the orbit of mercury. i have read a lot about noneuclidean geometry but i don't have any source on its application on the area mentioned above. All i know is that in that caise is being applied the law of general relativity of einstein which takes in consideration the precession of prihelion of mercury. Could anyone, please give me any tip more specifically how i can work on it or any online source that can help me? If there are aren't any in what direction i could i take my ee but still working on noneuclidean geometry (any specific math problem).Thanks a lot!