HR Diagram

Front

What is the HR Diagram?

Back

The HR Diagram (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

What category contains the most stars in the HR Diagram?

Back

Main Sequence.

Front

Where is our Sun located on the HR Diagram?

Back

The Sun is located in the Main Sequence category.

Front

What are the characteristics of Main Sequence stars?

Back

Main Sequence stars are in a stable phase of hydrogen burning, and they vary in size, temperature, and brightness.

Front

How do supergiants compare to main-sequence stars of the same spectral class?

Back

Supergiants are larger, brighter, and have similar temperatures compared to main-sequence stars of the same spectral class.

Front

What are White Dwarfs?

Back

White Dwarfs are the remnants of stars that have exhausted their nuclear fuel and are typically hot but not very bright.

Front

How do White Dwarfs compare to Giants?

Back

White Dwarfs are hotter and less bright than Giants.

Front

What is a Giant star?

Back

Giant stars are larger than main-sequence stars and have expanded and cooled, resulting in a lower surface temperature.

Front

What is the temperature range of Main Sequence stars?

Back

Main Sequence stars can range from about 2,500 K to over 30,000 K.

Front

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

Back

The Main Sequence represents the majority of stars, including the Sun, and indicates a stable phase of stellar evolution.