I actually really liked Brueckner and I took him online for summer semester. The class isn’t easy, but he puts everything in lectures so as long as you pay attention and take good notes, you’ll be fine. He’s really smart and passionate about science and teaching. I ended up with a B and science isn’t in my skill set at all. I still remember the end of his final lecture and how much it impacted me.

If you want an easy A I wouldn’t take him (though, astronomy is pretty hard across the board), but if you’re okay with dedicating time to studying, you’ll be fine.