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Ch 22: OAE Earth & Space Science: Galaxies

About This Chapter

Expand your knowledge of the universe's galaxies and their properties when you review this chapter's video lessons. Watch the lessons and complete the chapter quizzes prior to taking the OAE Earth and Space Science examination.

OAE Earth and Space Science: Galaxies - Chapter Summary

The illuminating video lessons in this chapter detail aspects of the Milky Way Galaxy as well as the sun, moon and planets of our solar system. Prior to sitting for the OAE Earth and Space Science examination, you could learn more about how a starburst galaxy is formed, recall how to identify differences between galaxies and reinforce your knowledge of voids and superclusters. This chapter's videos might also help you with:

  • Discovering characteristics of the universe, the galaxy and the solar system
  • Exploring the probability and results of the collision of galaxies
  • Explaining the formation of galaxies, including the Milky Way Galaxy
  • Discussing the purpose of the Hubble tuning fork diagram
  • Identifying different kinds of spiral galaxies and galaxy clusters
  • Describing the discovery and structure of the Milky Way
  • Understanding the mass of our galaxy

By utilizing these instructor-delivered video lessons as valuable study tools, you could prepare to answer questions about galaxies when you take the OAE Earth and Space Science examination. The lessons include video tags for locating information and written transcripts reflect the videos. Submit your questions on galaxies to the experts, and test your recollection by taking the lesson quizzes and the practice chapter examination.

OAE Earth and Space Science: Galaxies Chapter Objectives

Domain V of the five-part OAE Earth and Space Science examination will evaluate your knowledge of galaxies. You'll display your expertise throughout this 'Astronomy' domain, which accounts for 19% of the assessment score. This is a computer-administered examination that includes 150 multiple-choice questions. You'll be allowed up to 180 minutes to complete the test.

11 Lessons in Chapter 22: OAE Earth & Space Science: Galaxies
Test your knowledge with a 30-question chapter practice test
Solar System, Galaxy, & Universe: Definitions & Difference

1. Solar System, Galaxy, & Universe: Definitions & Difference

Want to learn what the universe, galaxy, and solar system are as well as some cool facts about each one? This lesson will give you an overview of what these three things are in a relatable fashion.

The Collision & Assembly of Galaxies

2. The Collision & Assembly of Galaxies

This lesson will talk about how the assembly and collision of galaxies is actually related, what starbursts are, what will happen to our own galaxy in four billion years, and why our galaxy is a galactic cannibal!

Galaxy Collisions: Ring & Elliptical Galaxies

3. Galaxy Collisions: Ring & Elliptical Galaxies

This lesson will discuss the collisions between galaxies and what happens to the stars within them. It will also cover what a ring galaxy is and how it forms, as well as where elliptical galaxies are most common.

Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

4. 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 Distribution of Galaxy Properties Along the Hubble Tuning Fork

5. The Distribution of Galaxy Properties Along the Hubble Tuning Fork

This lesson will explore Edwin Hubble's famous classification scheme. We'll go over the major morphological differences between the categories of galaxies and the differences within them.

Types of Spiral Galaxies

6. Types of Spiral Galaxies

Spiral galaxies are classified into several different types, depending on the characteristics of certain parts of their galaxy. Specifically, this lesson will go over Hubble's classification scheme of spiral galaxies with a small nod to lenticular galaxies as well.

What Are the Different Types of Galaxy Clusters?

7. What Are the Different Types of Galaxy Clusters?

This lesson will define five different types of clusters: rich, poor, irregular, regular, and superclusters. We'll also find out what voids are and what the Local Group is.

The Formation of the Milky Way Galaxy

8. 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.

How Our Galaxy Was Discovered

9. 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.

The Structure of Our Galaxy

10. 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 Mass of Our Galaxy

11. 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.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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