What’s the H-R diagram and what does it tell us?

The Hertzsprung–Russell diagram, abbreviated as H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars’ absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

How do you read a Hertzsprung diagram?

What characteristics of stars are shown on the Hertzsprung-Russell diagram?

The Hertzsprung–Russell diagram, or H–R diagram, is a plot of stellar luminosity against surface temperature. Most stars lie on the main sequence, which extends diagonally across the H–R diagram from high temperature and high luminosity to low temperature and low luminosity.

What does the Hertzsprung-Russell diagram tell us about the star Betelgeuse?

A red supergiant such as Betelgeuse would extend beyond the orbit of Jupiter if it replaced the Sun in our solar system. The final group of interest are those stars in group D. From their position on the H-R diagram we see that they are very hot yet very dim.

How does the Hertzsprung-Russell diagram help us in understanding the evolution of stars?

Depending on its initial mass, every star goes through specific evolutionary stages dictated by its internal structure and how it produces energy. Each of these stages corresponds to a change in the temperature and luminosity of the star, which can be seen to move to different regions on the HR diagram as it evolves.

Which two characteristics are used to classify stars on the Hertzsprung?

Characteristics used to classify stars include color, temperature, size, composition, and brightness. Stars vary in their chemical composition. Astronomers use spectrographs to determine the elements found in stars.

What two characteristics of stars are shown in an H-R diagram quizlet?

What two characteristics of stars are shown in an H-R diagram? The two characteristics are surface temperature and absolute brightness.

What is an H-R diagram quizlet?

WHAT IS A HERTZSPRUNG-RUSSELL DIAGRAM? A diagram that shows the relationship or differences between SURFACE TEMPERATURE and LUMINOSITY of STARS.

How is the HR diagram used to classify stars?

On the diagram stars are ranked from bottom to top in order of decreasing magnitude (increasing brightness) and from right to left by increasing temperature (spectral class). Stars of the galactic arm in which the Sun is located tend to fall into distinct regions on the diagram.

What are the two characteristics of an HR diagram?

Temperature. The two primary characteristics of the HR diagram are temperature and luminosity. Luminosity is defined as the brightness / absolute magnitude or output of energy; whereas, temperature is defined as the average speed of moving particles.

What reveals a star’s surface temperature?

What reveals a star’s surface temperature? A star’s surface temperature is revealed by color.