The Ancient Mathematician Who Measured the Sun

Picked one by one from a mixed channel. Transcript check: Explains Aristarchus's geometric method for measuring the sun, moon, and earth's relative sizes.. Channel rule: Include long-form history-of-math documentaries whose title names the concrete subject (a named person, problem, artifact or concept such as Archimedes, Einstein, x²/exponents, measuring the Sun). Exclude vague curiosity-gap titles that withhold what the video is about.