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Ch 37: Origins & Theories of the Universe

About This Chapter

Use our video lessons to refresh your comprehension of theories on the origins of the universe. Get information on how the universe evolved, its structure and ultimate fate.

Origins & Theories of the Universe - Chapter Summary

This chapter's lessons explore the origins and structure of our solar system and galaxy, as well as the whole universe. You'll look at several ideas on how the universe was formed and the evidence scientists have to support these ideas.

Other lessons explore the evolution of the early universe, and look at how scientists calculate the universe's age. Hubble's law and Hubble's constant are examined here, too. After completing this series of video lessons, you should be prepared to:

  • Define solar system, galaxy and universe
  • Explain the concepts of the expanding and contracting universe
  • Contrast the Steady State and the Big Bang theories
  • Analyze evidence for the Big Bang theory, such as background radiation and expansion
  • Explore the evolution of the early universe
  • Describe Hubble's law and Hubble's constant
  • Discuss the cosmological principle
  • Calculate the universe's age

These brief lessons are taught by professionals who make instruction both enjoyable and informative. Our format lets you study any time you have a few extra minutes and access to a computer or mobile device. You can assess your knowledge through the multiple-choice quizzes that follow each of the lessons.

9 Lessons in Chapter 37: Origins & Theories of the Universe
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.

Origins of the Universe: The Big Bang and Expanding & Contracting Universes

2. Origins of the Universe: The Big Bang and Expanding & Contracting Universes

Students will learn the origins of the universe, the Big Bang theory, the timeline of the universe, how the universe is still expanding to this day, and what astronomers expect the universe to look like in the future.

The Steady State Theory vs. the Big Bang Theory

3. The Steady State Theory vs. the Big Bang Theory

Did you know that the Big Bang wasn't always a well-accepted theory of our universe? There was a competing theory called the Steady State theory. Find out what it was all about and why its proponent actually helped name the Big Bang theory.

Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion

4. Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion

Discover what evidence exists to support the Big Bang theory of the birth of the universe. Learn how cosmic background radiation, the red shift of light and the ongoing expansion of the universe led scientists to believe that the universe was started with the Big Bang.

The Evolution of the Early Universe

5. The Evolution of the Early Universe

This lesson will describe four important stages of development in the early universe, the radiation era, recombination (decoupling) epoch, the dark age, and reionization era.

The Cosmological Principle

6. The Cosmological Principle

This lesson will dive into the famous cosmological principle by defining and explaining isotropy and homogeneity as well as their important implications for our universe.

How To Calculate the Age of the Universe

7. How To Calculate the Age of the Universe

This lesson will explain to you how old our universe is and how we calculate it thanks to the Hubble law and Hubble constant as well as one other simple equation.

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.

The Universe's Curvature, Age & Fate

9. The Universe's Curvature, Age & Fate

What is the age of our universe? What shape does it take? What determines the fate of our universe and what is this fate? This lesson will tell you all of this and more!

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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