An Ancient Extrasolar System with Five Sub-Earth-sized Planets - Dr. Tiago Campante

Picked one by one from a mixed channel. Transcript check: Expert research lecture explaining methodology and findings on an exoplanetary system, clearly educational.. Channel rule: Include full scientific lectures, public talks, research seminar presentations, scientist explainers of discoveries, and archive or history pieces that teach astronomy or geophysics; exclude career panels, travel/tourism features, ceremonial remarks, brief sky-event clips without substantive explanation, and society news.