Harold Lester Johnson References Harold Lester Johnson American astronomer Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: UBV system…1950s by the American astronomers Harold Lester Johnson and William Wilson Morgan and has largely superseded the less accurate system using the north polar sequence. Read More…1950s by the American astronomers Harold Lester Johnson and William Wilson Morgan and has largely superseded the less accurate system using the north polar sequence. Read More
