Cosmic distance ladder explained
Araucaria starred in episode 117 of Astronarium, Polish outreach series about astronomy (Polish language, but English subtitles coming soon!).
Our members explained why we have a whole menagerie of distance indicators and which of them are the most famous, accurate, or reliable. We also explained how the methods of distance determinations are interlocked and why we keep pushing the uncertainties of these methods to the minimum. Enjoy!