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Laabri

2.04 HR Diagram Lab

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Last updated about 1 month ago
12 Nsɛmmisa
Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

If you need help with the assignment, please watch the class recording

If you need help with the assignment, please watch the class recording

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1

The H-R diagram is an important tool astronomers use to understand stars. It shows how stars differ in temperature, brightness, and size, and helps us learn about their life stages.

In this assignment, you will explore how stars are placed on the H-R diagram and what their positions tell us about them.

Let's start with a blank H-R diagram and examine the vertical axis and horizontal axis.

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Asemmisa {{asɛmmisaAhyɛnsode}}
1.

The vertical axis of the H-R diagram shows at the bottom to , but it runs in an unusual way—from on the right

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

Where would you expect to find the following on the H-R diagram?

  • Hot, bright stars

  • Hot, dim stars

  • Cool, bright stars

  • Cool, dim stars

Drag the labels to the appropriate area.

Mmuae Afoforo a Wobɛpaw:

hot, dim stars

hot, bright stars

cool, dim stars

cool, bright stars

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

Use the star data and place each star's name where it should be found on the H-R Diagram.

Mmuae Afoforo a Wobɛpaw:
Antares

Sun

Regulus

Barnard's Star

Spica

Sirius B

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

This H-R diagram has more stars added to it. Do you notice any patterns? Use the drawing tools to show how the stars could be grouped together.

This is a thinking question--no right or wrong answers!

Asemmisa {{asɛmmisaAhyɛnsode}}
6.

Astronomers have grouped stars in these areas.Match the group's name to the appropriate description.

Draggable itemarrow_right_altCorresponding Item

Main sequence

arrow_right_alt

Small, dim, hot stars

White dwarfs

arrow_right_alt

Large, bright, cool stars

Giants & Supergiants

arrow_right_alt

Where the majority of stars are found

Asemmisa {{asɛmmisaAhyɛnsode}}
7.

Consider the Sun's place on the HR Diagram. How does it compare to other stars?

Compared to other stars, the Sun's luminosity is

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8.

Consider the following main sequence stars. Rank them by tempareture highest to lowest.

Note: If #8-11 are glitching for you, please use the chat bubble to type out the order and I will fix your grade

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

Consider the following main sequence stars. Rank them by luminosity highest to lowest.

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10.

Consider the following main sequence stars. Rank them by radius highest to lowest.

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11.

Consider the following main sequence stars. Rank them by mass highest to lowest.

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12.

The same stars from the previous questions are labeled on the HR diagram. What conclusion can you make about main sequence stars' temperature, mass, size, and luminosity?

Main sequence stars are arranged on the Hertzsprung-Russell diagram so that as you move from left to right, their temperature, mass, size, and luminosity