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Ch 34: Structure of the Milky Way Galaxy

About This Chapter

Use our video lessons and quizzes to get information about the origins and structure of the Milky Way. Refresh your knowledge about the stars in our galaxy, its mass and how Hubble's law and Hubble's constant help us understand the Milky Way.

Structure of the Milky Way Galaxy - Chapter Summary

Let this chapter's lessons help you review facts about the structure of galaxies, with a focus on our Milky Way. See how the Milky Way galaxy is shaped, examine its spiral arms, and see what is at the nucleus of a galaxy. You'll brush up on types of stars, the mass of the galaxy, and examine what Hubble's law and Hubble's constant have to say about deep space. Viewing these lessons should enable you to:

  • Describe spiral, elliptical and irregular galaxies
  • Explain theories on how the Milky Way formed
  • Outline the Milky Way's structure
  • Explore what is at the nucleus of a galaxy
  • Describe population I and population II stars
  • Report on the galaxy's mass
  • Use Hubble's law and Hubble's constant to understand the Milky Way

These lessons go over topics you may have studied in high school or college, and may offer some new information, too. Our instructors have created lessons and quizzes that make studying enjoyable. If you have any questions, you can contact the instructor for some personalized help.

8 Lessons in Chapter 34: Structure of the Milky Way Galaxy
Test your knowledge with a 30-question chapter practice test
Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

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.

The Formation of the Milky Way Galaxy

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.

The Structure of Our Galaxy

3. 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.

The Nucleus of a Galaxy

4. 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.

The Spiral Arms of the Milky Way Galaxy

5. 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.

Population I and Population II Stars

6. 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.

The Mass of Our Galaxy

7. 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.

Hubble's Law & Hubble's Constant

8. Hubble's Law & Hubble's Constant

This lesson will go over and define the Hubble Law and Hubble constant. We'll not only do a practice problem but also define conceptually what these two things mean to our cosmos.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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