<https://zh-tw.coursera.org/lecture/life-on-other-planets/physics-overview-oDTOH#lecture>
<http://schema.org/thumbnailURL>
"https://d3c33hcgiwev3.cloudfront.net/imageAssetProxy.v1/j8O2EV2bEeWU1Q7owdM6UQ.processed/thumbnails/720p/0.jpg?expiry=1664668800000&hmac=xj1CbcwnBRfpRFm7CcZLWieWzxmrWI6h2X7SsucuVhk"
<https://zh-tw.coursera.org/lecture/life-on-other-planets/physics-overview-oDTOH?authMode=signup>