Astronomy - Ch. 24: Variable Stars (9 of 26) Cepheid Variables: Why Do They Vary?
3 years ago
[{"url":"https://i.ytimg.com/vi/q-szkabhXQQ/hqdefault.jpg?sqp=-oaymwEcCOADEI4CSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCLt1cw2vQP3b5HjgmoRv4iL399XQ","width":480,"height":270}]
{"url":"https://i.ytimg.com/an_webp/q-szkabhXQQ/mqdefault_6s.webp?du=3000&sqp=CJCfsakG&rs=AOn4CLD0RzBPAFo2j9kb-HGSCplF5R_vlg","width":320,"height":180}
[{"text":"We will learn why for thousands of years that the Cepheid "},{"text":"variables","bold":true},{"text":" star expand-contract periodically every 5.4 days. Next "},{"text":"video","bold":true},{"text":" in\u00a0..."}]
{"name":"Michel van Biezen","id":"UCiGxYawhEp4QyFcX0R60YdQ","thumbnails":[{"url":"https://yt3.ggpht.com/ytc/APkrFKYLXbeklHdKRNi_FVjwmk3WQUvSZl3wb6zZsk6GEQ=s68-c-k-c0x00ffffff-no-rj","width":68,"height":68}],"link":"https://www.youtube.com/channel/UCiGxYawhEp4QyFcX0R60YdQ"}
{"title":"Astronomy - Ch. 24: Variable Stars (9 of 26) Cepheid Variables: Why Do They Vary? by Michel van Biezen 4,958 views 3 years ago 5 minutes, 5 seconds","duration":"5 minutes, 5 seconds"}