Hello, I am new to this forum, I appreciate any help and guidance anyone can give me. I am currently working towards a BS in Physics, with minors in Mathematics and Astrophysics. My goal after my BS is grad school for a PhD in Astrophysics, and am interested in a career in research. The minor in mathematics is actually a freebie, since my Physics major requirements already fullfill the Math minor at my university. I am a predominately straight A student with a 3.89 gpa. I started college back up after being out of high school for 10 years, so I had to retake some basic math courses to catch myself back up. After 1.5 years, I am just now getting into General Physics 1, which is a Calculus based class. I could not take it until I had the Calculus 1 prerequisite, which is why I am just now starting with it 1.5 years in. I started out very well, got a 98% on my first exam, and maintained a 96% class average. Things look very dismal now after taking my 2nd exam. I haven't received my score back yet, but I am not very optimistic, I know I did poorly. This exam could potentially tank my class average down to a C, which looks horrible considering Physics is my major, and this is just a General Physics course. My question is, how important are grades to get into graduate school? Are Cs in your major courses acceptable, or am I kind of screwed now? Perhaps I am jumping the gun on this, but I am really worried at this point that maybe my goals may have been set to high. I am wondering if I need to rethink my options. I really love Physics and want a career in the field, but I'm wondering now if that is no longer a realistic goal. This Physics course is the roughest I have taken so far, and has been causing me large amounts of stress. And I know this is just the beginning. Any advice would be appreciated. Thanks for reading, sorry about the length.