HR-Diagram

Front

What does the HR-Diagram represent?

Back

The HR-Diagram (Hertzsprung-Russell Diagram) is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What happens to stars as you move left on the HR-Diagram?

Back

As you move to the left on the HR-Diagram, stars get hotter.

Front

Which type of star is the coldest?

Back

Red Star is considered the coldest type of star.

Front

What is a giant star?

Back

A giant star is a star that has expanded and cooled, typically found in the upper right of the HR-Diagram.

Front

Which star is hotter than Deneb?

Back

Regel is hotter than Deneb.

Front

Which star is brighter than the Sun?

Back

Aldebaran is brighter than the Sun.

Front

What is the significance of the main sequence in the HR-Diagram?

Back

The main sequence is where most stars, including the Sun, are found, and it represents a stable phase of stellar evolution.

Front

What are the two axes of the HR-Diagram?

Back

The vertical axis represents luminosity (brightness), and the horizontal axis represents temperature (color) of stars.

Front

What type of stars are found in the upper right of the HR-Diagram?

Back

Red giants and supergiants are found in the upper right of the HR-Diagram.

Front

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

Back

Hotter stars appear blue or white, while cooler stars appear red or orange.