There's also a free mini-course by David Butler https://www.youtube.com/playlist?list=PLpH1IDQEoE8Q8842yVe-V8m7PN-R9rlwi https://www.youtube.com/playlist?list=

There's also a free mini-course by David Butler https://www.youtube.com/playlist?list=PLpH1IDQEoE8Q8842yVe-V8m7PN-R9rlwi https://www.youtube.com/playlist?list=PLpH1IDQEoE8Q8842yVe-V... It goes into a little more detail than a typical popularizing course, but enough even for laypeople to understand. David Butler also has a great introduction to astronomy in the same style: https://www.youtube.com/playlist?list=PLpH1IDQEoE8QWWTnWG5cK4ePCqg9W2608 https://www.youtube.com/playlist?list=PLpH1IDQEoE8QWWTnWG5cK...