If this is the class on exoplanets, I highly recommend taking it with Professor Arras. The class is fairly easy and Arras is a really nice guy. There is usually weekly homework and readings, but they barely take any time. You also do not need to read the textbook he assigns as it is filled with advanced physics problems you will most likely not even need. Exams and quizzes are also fairly easy and straightforward. This is one of the few classes I enjoyed last year that I actually got a lot out of.