Astronomy is a great topic, though some parts are more boring than others. But, throughout the entire unit, I would have to say that my favorite parts of it was when we learned about how the universe formed (Big Bang Theory) and how stars form.
What we have learned has pretty much been self-explainitory and all the information is sufficient and has sufficed, but if there's one thing I still question, it's how we got to create and understand the Doppler Effect. That part is still a bit confusing and also not quite clear, although I get the concept; if it goes toward the red side of the spectrum it's expanding, if it's toward the blue side of the specturm it's contracting.
Nothing in particular was confusing or puzzling in any way, so I don't really have much to question (Sorry Mr.Ullrich)
Well, yeah... That's astronomy for you ;)