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 are white dwarfs?

Back

White dwarfs are small, dense stars that are the remnants of stars that have exhausted their nuclear fuel and shed their outer layers.

Front

Where are white dwarfs located on the HR Diagram?

Back

White dwarfs are located in Area Z of the HR Diagram.

Front

What spectral class does our star, the sun, belong to?

Back

The sun belongs to spectral class G.

Front

Where would our sun be located on the HR Diagram?

Back

The sun is located in Quadrant 4 of the HR Diagram.

Front

What is the Main Sequence?

Back

The Main Sequence is a continuous and distinctive band of stars that appears on the HR Diagram, where stars spend the majority of their lifetimes fusing hydrogen into helium.

Front

What category contains the most stars on the HR Diagram?

Back

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

Front

What are red giants?

Back

Red giants are large stars that have expanded and cooled after exhausting the hydrogen in their cores.

Front

Where are red giants located on the HR Diagram?

Back

Red giants are located in Area X of the HR Diagram.

Front

What is a supergiant star?

Back

Supergiant stars are among the largest stars in the universe, significantly larger than the sun, and they are located above the Main Sequence on the HR Diagram.