Ch 9: The Universe Beyond Our Solar System

About This Chapter

12 Lessons in Chapter 9: The Universe Beyond Our Solar System
Test your knowledge with a 30-question chapter practice test
Galaxy: Definition & Explanation

1. Galaxy: Definition & Explanation

Galaxies are collections of stars, dust, and gas rotating around super massive black holes. This lesson will cover the structures and types of galaxies, including spiral, elliptical, and irregular galaxies.

Proto-Galaxies: Definition & Explanation

2. Proto-Galaxies: Definition & Explanation

A proto-galaxy is a cloud of dust and gas, primarily hydrogen and helium, that is forming into a galaxy from the force of gravity. This lesson will define and go over the processes of a proto-galaxy.

The Big Dipper Constellation: Facts & North Star

3. The Big Dipper Constellation: Facts & North Star

The Big Dipper is one of the most famous constellations in the sky. . . or is it? This lesson will explore these seven easy-to-locate stars and their relation to Polaris, the North Star.

Planetary Nebula: Definition & Facts

4. Planetary Nebula: Definition & Facts

Planetary nebulas are perhaps one of the most spectacular sights in the night sky. Learn the definition of a planetary nebula and take a look at some of the most famous ones in the universe in this lesson.

Quasar: Definition & Overview

5. Quasar: Definition & Overview

In this lesson we will explain what quasars are, why they were so puzzling when discovered, and how they can look quite different when observed from different angles. A short quiz will follow.

Irregular Galaxy: Definition, Facts & Names

6. Irregular Galaxy: Definition, Facts & Names

Galaxies come in many forms and shapes, and irregular galaxies are those that have no form or structure to them. Making up roughly 25% of all galaxies in the universe, they are important in understanding the evolution of galaxies. After this lesson, there will be a quiz to test your knowledge.

Nebula: Definition & Theory

7. Nebula: Definition & Theory

A nebula is a large cloud of gas and dust particles. Nebulae are known as nurseries for stars, while at the same time most are created by the death of stars. This lesson will define and explain nebulae.

Spiral Galaxy: Definition & Facts

8. Spiral Galaxy: Definition & Facts

Spiral galaxies are one of the classifications of galaxies designated by the Hubble Classification System. Our own galaxy, the Milky Way, is considered a Spiral Galaxy. This lesson will define Spiral Galaxies and provide facts about them.

The Milky Way Galaxy: Stars, Center & Pictures

9. The Milky Way Galaxy: Stars, Center & Pictures

Our galaxy, the Milky Way, is home to our sun, along with around 250 billion other stars. This lesson will cover the features of our galaxy and provide a quiz at the end to test your knowledge.

Cosmic Microwave Background Radiation: Definition & Overview

10. Cosmic Microwave Background Radiation: Definition & Overview

This lesson defines cosmic microwave background radiation, including the history behind its discovery and what this tells us about the universe as a whole. A short quiz will follow.

Elliptical Galaxy: Definition, Examples & Facts

11. Elliptical Galaxy: Definition, Examples & Facts

Elliptical galaxies are one of the galaxy classifications in the Hubble Classification System. These galaxies are older than most other galaxies and only make up a small part of all galaxies. This lesson will cover the classification methods and facts about elliptical galaxies.

Orion Constellation: Stars & Belt

12. Orion Constellation: Stars & Belt

In this lesson, we will focus on the constellation Orion. Soon you can impress your friends with your keen ability to locate this stellar hunter while you amaze them with a touch of both mythology and astronomy.

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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