If you want to know how things work, or if you want to know anything really, just ask my son, Peter. He is a veritable font of knowledge on pretty much any topic, even some about which he actually knows very little. Peter is also a great explainer, and I think has the makings of good teacher at the professorial level - he really enjoys explaining things, and is surprisingly patient with questions and follow-up. I can see him mentoring future astrophysicists, once he attains that status himself.
Peter has started his own blog, How It Works, I think loosely modeled on David Macauley and Neil Ardley's The New Way Things Work. Whatever his inspiration, it's great, and you are sure to learn a lot if you follow it.