8.8A H-R Diagram Mini Flashcard 2

Front

What is the Hertzsprung-Russell (H-R) diagram?

Back

A graphical tool used to classify stars based on their brightness (luminosity) and surface temperature.

Front

What classification does Regulus belong to in the H-R diagram?

Back

Main Sequence Stars.

Front

How does Betelgeuse compare to the Sun in terms of temperature and brightness?

Back

Betelgeuse is cooler and brighter than the Sun.

Front

What type of star has a surface temperature of about 25,000 K and is as bright as the Sun?

Back

White dwarf.

Front

Which classification of stars shows the greatest range of temperatures and brightness?

Back

Main Sequence.

Front

What is the surface temperature of a red giant star that is about 5,000 times brighter than the Sun?

Back

About 3,800 K.

Front

What are the main characteristics of Main Sequence stars?

Back

They are in a stable phase of hydrogen burning and have a wide range of temperatures and luminosities.

Front

What is the significance of a star's luminosity in the H-R diagram?

Back

Luminosity indicates the total amount of energy a star emits, which helps classify it.

Front

What type of stars are typically found in the upper right corner of the H-R diagram?

Back

Red giants and supergiants.

Front

What does a star's surface temperature tell us about its color?

Back

Higher temperatures correspond to blue or white colors, while lower temperatures correspond to red or orange colors.