Astrophysicist Alain Lecavelier des Etangs (Institut d'Astrophysique de Paris, France) tells how he discovered light variations of Beta-Pictoris from data from 1981 and how he inferred it could be due to the transit of a planet (part 3). Also see https://picsat.obspm.fr/science/scien... for science references.

With many thanks to Jean Mouette from the Institut d'Astrophysique de Paris for technical support with the interview.