HR Diagram

Front

What is the HR Diagram?

Back

The HR Diagram, or Hertzsprung-Russell Diagram, is a scatter plot that shows the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

How is the Sun classified in terms of size and temperature?

Back

The Sun is classified as a medium size star with a medium temperature.

Front

What area of the HR Diagram contains the majority of stars?

Back

The Main Sequence is the category that contains the most stars.

Front

Which type of star is the coldest?

Back

The coldest type of star is the Red Star.

Front

What does area C of the HR Diagram represent?

Back

Area C represents stars that are Dim and Hotter.

Front

What does area D of the HR Diagram represent?

Back

Area D represents stars that are Dimmer and Cooler.

Front

What is the relationship between a star's temperature and its brightness?

Back

Generally, hotter stars are brighter, while cooler stars are dimmer.

Front

What are Supergiants in the context of the HR Diagram?

Back

Supergiants are a category of stars that are very large and very bright, located above the Main Sequence on the HR Diagram.

Front

What is the significance of the Main Sequence on the HR Diagram?

Back

The Main Sequence is significant because it represents the stage in a star's life where it is fusing hydrogen into helium, which is the most stable phase for most stars.

Front

How do giants differ from supergiants?

Back

Giants are large stars that are less luminous than supergiants but still larger than main sequence stars.