The Hertzsprung-Russell (H-R) Diagram

Ejnar Hertzsprung

In this topic, you will explore the Hertzsprung-Russell (H-R) diagram and its contributions to the study of stellar evolution. Before you get started, check out the two scientist profiles. Perform an internet search for Ejnar Hertzsprung and Henry Russell. You may want to use the following questions to guide your search:

• From which countries were Ejnar Hertzsprung and Henry Russell?
• When did they create the Hertzsprung-Russell (H-R) diagram?
• Where were they working when they created the Hertzsprung-Russell (H-R) diagram?