# What does an H-R diagram reveal about star types?

## What does an H-R diagram reveal about star types?

They can also reveal information about its temperature, motion through space, and its magnetic field strength. By plotting the stars on the H-R diagram according to their temperatures, spectral classes, and luminosity, astronomers can classify stars into their different types.

What does H-R diagram represent?

Hertzsprung-Russell diagram
Hertzsprung-Russell diagram, also called H-R diagram, in astronomy, graph in which the absolute magnitudes (intrinsic brightness) of stars are plotted against their spectral types (temperatures).

How does the H-R diagram plot stars?

Since stars are plotted on the H-R diagram by absolute magnitude and/or luminosity and surface temperature (stellar classification), each star is plotted as one data point. The stars define the shape of the main sequence and the regions occupied by giants, supergiants and white dwarfs.

### How are the main sequence stars plotted on the H-R diagram?

What are the 4 types of stars in the HR diagram?

Star Classification. The Sun is a as a G2V type star, a yellow dwarf and a main sequence star.

• Hertzsprung – Russell Diagram.
• Main Sequence Stars – Young Stars.
• DWARF STARS.
• YELLOW DWARF.
• RED DWARF.
• Giant and Supergiant Stars – Old, Large Stars.
• RED GIANT.
• What are the 4 categories of stars on an HR diagram?

H-R Diagram Exercise Then you are going to use a relationship called Stephan’s Law to calculate the stars’ radii. By comparing the radii of different stars you will then find out the reason behind the names of the four categories of stars: white dwarfs, main-sequence stars, giants and supergiants.

## What is the main sequence of the HR diagram?

The main sequence stretching from the upper left (hot, luminous stars) to the bottom right (cool, faint stars) dominates the HR diagram. It is here that stars spend about 90% of their lives burning hydrogen into helium in their cores. Main sequence stars have a Morgan-Keenan luminosity class labelled V.

How do you plot an HR diagram?

Plot the luminosity on the y-axis with brighter stars going toward the top. Since brighter stars have lower magnitudes, if you choose to plot magnitude on the y-axis, the values will decrease as you go up! That’s OK – just remember that the luminosity of the star is increasing. Plot temperature on the x-axis.

What is Ahr diagram?

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.

### What are the 7 main types of stars?

There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. This is known as the Morgan–Keenan (MK) system.