About this archive
KALY COSMOS makes explainer videos about astronomy and physics: what the James Webb Space Telescope sees, why nothing crosses a light year easily, what a 330-million-light-year void actually is, and why we have never heard from anyone else. This page collects every episode in one place, newest first.
Videos play through YouTube's privacy-enhanced player, so no tracking cookies are set before you press play. The full channel is on YouTube. This site is supported by advertising — see the privacy notice for how that works.