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 factor affects the color of a star?

Back

The surface temperature of the star affects its color.

Front

What type of star has a high temperature and a high luminosity?

Back

Blue Giants are stars that have high temperature and high luminosity.

Front

What is the approximate surface temperature of the Sun?

Back

The approximate surface temperature of the Sun is 5,500 °C.

Front

Is the luminosity of Red Giant stars higher or lower than Red Supergiants?

Back

The luminosity of Red Giant stars is lower than that of Red Supergiants.

Front

Is the surface temperature of White Dwarf stars higher or lower than Red Supergiants?

Back

The surface temperature of White Dwarf stars is higher than that of Red Supergiants.

Front

What is luminosity?

Back

Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.

Front

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

Back

A star's color is determined by its surface temperature; hotter stars appear blue, while cooler stars appear red.

Front

What are the main categories of stars in the HR Diagram?

Back

The main categories of stars in the HR Diagram include Main Sequence stars, Giants, Supergiants, and White Dwarfs.

Front

What is a Main Sequence star?

Back

A Main Sequence star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core.