Recognizing AAVSO's All-Stars
1:19:34
Bob King on visual observing & the awe of variable stars
30:03
Supernovae: The Most Extreme Explosions!
1:32:03
How to observe in the city
1:40:40
⌛ [David Elbaz] L’histoire de l’univers racontée par la lumière
1:26:18
Paula Szkody on Cataclysmic Variables — an overview
1:41:40
☀️[Roland Lehoucq] Pourquoi le Soleil brille
1:25:24
Understand photometric transforms & filters with Brian Kloppenborg
1:33:36