About This Chapter
Below is a sample breakdown of the Milky Way Galaxy chapter into a 5-day school week. Based on the pace of your course, you may need to adapt the lesson plan to fit your needs.
|Day||Topics||Key Terms and Concepts Covered|
|Monday||How galaxies are formed|
Theories about the formation of the Milky Way
|The creation of spiral, elliptical and irregular galaxies|
Monolithic collapse and the bottom-up hypothesis
|Tuesday|| Discovery of the Milky Way|
Structure of the Milky Way
|How scientists determined the existence of the Milky Way|
Halo, disc component, central bulge
|Wednesday|| Nucleus of a galaxy|
Milky Way's spiral arms
|Definition of the nucleus, what goes on there|
How we know the shape of the galaxy, radio waves, H I Hydrogen
|Thursday|| Spiral density wave theory|
Population I and II stars
|Definition of spiral density waves and their purpose|
Definition of Population I and II stars, their compositions and where they are found
|Friday||Our galaxy's mass||Difference between the galaxy's disc and halo, Keplerian motion, galactic year, galactic corona, dark matter|
1. Galaxy Formation: Spiral, Elliptical & Irregular Galaxies
This lesson explains how galaxies form, starting with the Big Bang. You'll also learn about the solar nebula hypothesis and three galaxy types, including spiral, elliptical, and irregular galaxies.
2. The Formation of the Milky Way Galaxy
This lesson will explore two hypotheses as to how the Milky Way galaxy formed. These are the top-down and bottom-up hypotheses. We'll also go into what special connection you personally have to all of this.
3. How Our Galaxy Was Discovered
This lesson will outline for you the basics of how the galaxy you live in, the Milky Way Galaxy, was discovered over time. You'll also learn about RR Lyrae and Cepheid variable stars.
4. The Structure of Our Galaxy
If you ever looked up at the night sky far away from city lights, you would've seen a band of light across the night sky and lots of stars scattered around the rest of the sky. Why? The structure of our galaxy will explain exactly why.
5. The Nucleus of a Galaxy
This lesson will explore our galaxy's nucleus. Namely, we will find out how we can peer inside using radio waves and infrared, and what that and X-rays tell us about the cool thing that's located inside of it.
6. The Spiral Arms of the Milky Way Galaxy
How do we know our galaxy has spiral arms? You can't really see them, but we can infer they're there thanks to radio waves and observations of other galaxies, which you will learn about in this lesson.
7. Density Wave Theory & Spiral Galaxies
This lesson will teach you about the spiral arms of the galaxy: namely, the major theory that tries to explain their existence as well as why the spiral arms look so different in various kinds of spiral galaxies.
8. Population I and Population II Stars
This lesson will explore the different populations of stars in our galaxy, including population I and II stars, as well as where you can find them and what metals are to an astronomer.
9. The Mass of Our Galaxy
This lessons explores the estimates and numbers surrounding the mass of the Milky Way Galaxy and how they relate to Keplerian motion, the galactic corona, and dark matter.
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