HR Diagram Flashcard

Front

What color is associated with the coolest temperature according to the Kelvin temperature scale?

Back

Red

Front

What does the Hertzsprung-Russell diagram illustrate?

Back

The relationship between the average surface temperature of stars and their absolute magnitude.

Front

What term is often used instead of 'brightness' when discussing stars?

Back

Luminosity

Front

What does luminosity measure in relation to a star?

Back

How much energy leaves a star in a certain period of time.

Front

Which type of stars are found in the lower left of the Hertzsprung-Russell Diagram?

Back

White dwarfs.

Front

What is the main purpose of the Hertzsprung-Russell diagram?

Back

To classify stars based on their luminosity and temperature.

Front

What are the two main axes of the Hertzsprung-Russell diagram?

Back

Luminosity (vertical axis) and temperature (horizontal axis).

Front

What type of stars are located in the upper right of the Hertzsprung-Russell diagram?

Back

Supergiants.

Front

What is the significance of a star's color in relation to its temperature?

Back

A star's color indicates its surface temperature; blue stars are hotter, while red stars are cooler.

Front

What is the difference between absolute magnitude and apparent magnitude?

Back

Absolute magnitude measures a star's brightness at a standard distance, while apparent magnitude measures brightness as seen from Earth.