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December 19,2011. Objective . Agenda. Analyze and create the H-R Diagram. Star Video H-R Diagram notes ( 1 slide to write down) H-R Diagram Graph Textbook pages 789-792 questions 1-7 TEST IS THURSDAY. Hertzprung-Russell Diagram
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Objective Agenda • Analyze and create the H-R Diagram • Star Video • H-R Diagram notes ( 1 slide to write down) • H-R Diagram Graph • Textbook pages 789-792 questions 1-7 • TEST IS THURSDAY
Hertzprung-Russell Diagram • Shows the relationship between a star’s surface temperature and absolute magnitude • Used to study the lives of stars • Most stars lie along the main sequence portion of the diagram
Question 1 • What kind of a star is the sun?
Answer • Main Sequence
Question 2 • What is the H-R diagram?
Answer • A graph that shows the relationship between a star’s temperature and absolute magnitude
Question 3 • What are the four main types of stars?
Answer • Main-Sequence • Giants and Supergiants • White Dwarfs