Recognizing AAVSO's All-Stars
1:19:34
Bob King on visual observing & the awe of variable stars
1:26:18
Paula Szkody on Cataclysmic Variables — an overview
1:32:03
How to observe in the city
1:08:30
Meet the AAVSO's Exoplanet, YSO, and I&E Sections
16:08
How Digital Telescopes Transformed Amateur Astronomy - Making Astrophotography Easy For Everyone!
1:25:24
Understand photometric transforms & filters with Brian Kloppenborg
2:40:55
How To: Introductory Photometry
32:05