H-R Diagram

Students use information about various stars to create diagrams by understanding the relationship between star color, size and temperature.

By creating an H - R map, you can see that most stars lie on a smooth diagonal called the main sequence, bright upper incandescent stars, and lower right dark stars. By finishing activities and class discussions, students can better understand where our stars (the sun) are related to the various stars in our universe.

Construct a graph to see if there is any relationship between star color, size, and temperature by building part of the Hertzsprung-Russell diagram.

Using the image of the Highland Road Park Observatory, select at least one star at any stage of the chart and present it to the class.

Student Worksheet, Hertzsprung-Russell Star Chart, Hertzsprung-Russell Chart Chart, Red, Orange, Yellow, White, Blue, Red - Orange Pencil or Crayon, and Starry Night Pro

When the group starts up, let the group select stars to render using the Starry Night Pro program. Teachers should instruct their students to use Starry Night Pro. There is an instruction on the student worksheet number 10

I will instruct the students to complete the activity on the worksheet and answer the multiple choice question

In complete sentences, students announce their reasoning about the charts completed in the essay.

I will explain how stars can contribute to the birth and death of stars. The basics of the HR diagram fully explains the chart, including examples of temperature and brightness, and examples of quality and brightness. The conclusion here is a good way to end the course

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Hertzsprung - Russell plot or H - R plot is a plot of stellar luminosity versus surface temperature. Most of the stars are located on the main line, extending from the high temperature high brightness to the low temperature low brightness obliquely from the H - R chart. The position of the star along the main sequence is determined by its quality. A high-quality star will emit more energy than a low-mass star of the main line and it will be hotter. The main sequence star gains energy from the fusion of protons and scorpions. About 90% of the stars are in the main line. Only about 10% of stars are white dwarfs, less than 1% are superstars or superstars.

The Hertzsprung - Russell or H - R plot is a plot of the absolute value of a star as a function of its surface temperature. In the HR diagram, various kinds of stars, such as main sequence star, red giant star and white dwarf star, are placed in clearly defined areas. This allows you to assign features to stars using maps. Cepheid variable stars are stars whose absolute magnitude or brightness periodically changes. Since we found that there is a linear relationship between the length of these periods and the absolute size of the stars, to estimate the absolute size of the given star we measure the time between the maximum values ​​of the brightness only. Then you can calculate the distance to the star using the inverse square law of intensity. This is one of the best ways for astronomers to find distant stars and the galaxies where they live.

When the H - R map spreads, you can find a new way (spectral disparity) to determine the distance from the star. In fact, because the parallax angle has not been measured, this is a very confusing term. It is done by taking the spectrum of the star and determining the position of the star on the H - R diagram, so it should be called the spectral distance. You can set the H - R plot using the absolute amplitude of the vertical axis; you can read the absolute magnitude of a star by sorting stars with spectral type and metering level. This can be compared with the apparent size of the distance obtained. Suppose there is a star to get that spectrum. Compared to other stars, you can see that the spectrum of the star is the K1 IV star. The temperature of K1 star is about 5000K. Looking at Figure 7, the absolute strength of such a star is about 1.