What are the 2 variables shown on the H-R 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 a hertzsprung-Russell H-R diagram show?

The Hertzsprung-Russell diagram is a graph that plots the temperature of a star against its absolute magnitude or luminosity. It was created by astronomers Ejnar Hertzsprung and Henry Norris Russell about 1910, and can be used to chart the life cycle or evolution of a star.

What two characteristics are graphed on the H-R diagram?

These diagrams, called the Hertzsprung-Russell or HR diagrams, plot luminosity in solar units on the Y axis and stellar temperature on the X axis, as shown below. Notice that the scales are not linear. Hot stars inhabit the left hand side of the diagram, cool stars the right hand side.

Which of the following best describes the axes of a hertzsprung-Russell HR diagram?

All of the above are true. Which of the following statements about spectral types of stars is true? The spectral type of a star can be used to determine its surface temperature. Which of the following best describes the axes of a Hertzsprung-Russell (H-R) diagram?

Where do we find the most massive stars on the main sequence in a Hertzsprung-Russell diagram?

Where are the most massive stars to be found in the main sequence of a Hertzsprung-Russell diagram? The upper, left end.

What is the Hertzsprung Russell Diagram How does a star in the upper left section differ from one in the lower right?

A star in the upper left corner of the diagram would be hot and bright. A star in the upper right corner of the diagram would be cool and bright. The Sun rests approximately in the middle of the diagram, and it is the star which we use for comparison. A star in the lower left corner of the diagram would be hot and dim.

Which two properties of stars are compared in an H-R diagram?

Three properties which are suitable for comparing stars are temperature, luminosity and radius.

Which of the following can be plotted on the horizontal axis of a Hertzsprung-Russell diagram?

Note that any star can be plotted on the H-R diagram if you know its surface temperature and luminosity. Also recall that the horizontal axis can be equivalently labeled with spectral type in the order OBAFGKM, because O stars are the hottest and M stars are the coolest.

What does the Hertzsprung-Russell diagram look like?

This Hertzsprung-Russell diagram shows a group of stars in various stages of their evolution. By far the most prominent feature is the main sequence, which runs from the upper left (hot, luminous stars) to the bottom right (cool, faint stars) of the diagram. The giant branch is also well populated and there are many white dwarfs.

What did Ejnar Hertzsprung discover?

At the beginning of the 20th century two astronomers, Ejnar Hertzsprung, and Norris Russell found (independently of each other) that if stars were plotted on a diagram with their luminosity on one axis, and their spectral class on the other, that stars formed three distinct groups.

What does an HR diagram show?

An HR diagram showing many well known stars in the Milky Way galaxy. 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 is the H-R diagram used in astronomy?

The H-R diagram can be used by scientists to roughly measure how far away a star cluster or galaxy is from Earth. This can be done by comparing the apparent magnitudes of the stars in the cluster to the absolute magnitudes of stars with known distances (or of model stars).