astro 3 with professor petigura was amazing! I liked his lectures and the workload wasn't bad and the material was interesting but above all he was really helpful and caring throughout the entire quarter. our midterm was 24 hr and open note; our final was optional, 48 hr, open note, no harm. the exams were kinda hard though. I also liked that he recorded lectures and uploaded them on ccle. labs were fine, a bit difficult sometimes but the ta (alec) helped a lot. I wouldn't say the class is an easy a but it's also not super intense or anything. either way, astronomy is interesting as hell and I would definitely recommend :)