About This Chapter
Cosmological Theories of the Universe - Chapter Summary
In this chapter, our professional instructors cover the early universe's different developmental periods, such as the radiation and reionization eras. The Big Bang theory is explained and you'll get to review why it's the most widely accepted theory of its kind. Check your understanding of how this theory is different from the Steady State theory in a lesson. More topics in the chapter include:
- Hubble's constant
- The universe's fate as well as age and shape
- How a galaxy differs from the universe
By being able to view these videos from mobile devices in addition to computers, you can check them out from anywhere you can get an Internet connection. The video tags provide an easy way to recheck any specific segments of lessons as you go through the chapter. You can get confirmation of your understanding of the content by completing the short practice quizzes found with each of the lessons.
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.
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.
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.
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.
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.
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.
7. 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.
8. 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.
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!
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Other chapters within the NES Earth & Space Science - WEST (307): Practice & Study Guide course
- The Scientific Revolution & Society
- Scientific Research & Experiments
- Laboratory Equipment, Solutions & Measurements
- Using Mathematics in Science
- Reading & Constructing Maps
- Cycles and Spheres of Earth
- Rocks & Minerals
- Earth's Internal Structure
- The Lithosphere
- Understanding Earthquakes
- Weathering, Erosion & Soil
- Geologic Time & Relative Dating
- Natural Resources & Energy
- Earth's Water Balance
- Oceans & Tides
- Ground Water Systems
- Flowing Water
- Water Resource Issues
- Atmospheric Cycle & Solar Energy
- Earth's Climate Systems
- Air Masses & Wind
- Severe Weather & Disturbances
- Weather Forecasting & Analysis
- Atmospheric Changes
- Formation & Phases of the Moon
- The Sun's Structure, Energy & Life Cycle
- Solar Radiation, Energy & Light
- Orbits & Gravity
- Formation of the Solar System
- Solar System Components & Characteristics
- The Laws of Kepler & Newton
- Star Types & Life Cycle
- Stars, Energy & Spectra
- Space Science Technology
- NES/WEST Earth & Space Science Flashcards