Ch 15: MEGA Earth Science: Astronomical Objects & Processes

About This Chapter

Use this chapter to review information about astronomical objects and processes as you prepare for the MEGA Earth Science exam. These lessons deal with stellar objects both in and beyond this galaxy.

MEGA Earth Science: Astronomical Objects & Processes - Chapter Summary

You can go over the astronomical objects and processes you'll be tested on by the MEGA Earth Science exam with this chapter. Use these text and video lessons to make sure you're familiar with:

  • The sun
  • Types of stars
  • Inner, outer and dwarf planets in our solar system
  • Types of galaxies
  • Origins of the universe
  • Black holes

Our instructors crafted these lessons to walk you through what you need to know about planets and stars. Each lesson highlights key astronomical terms and concepts to prepare you for the exam.

9 Lessons in Chapter 15: MEGA Earth Science: Astronomical Objects & Processes
Test your knowledge with a 30-question chapter practice test
Structure of the Sun

1. Structure of the Sun

Discover the layers of the sun, including the core, radiative zone, convective zone, photosphere, chromosphere, and corona. Find out which layers you can see from Earth. Investigate what sunspots and solar flares are.

Types of Stars by Size, Color and Life Cycle

2. Types of Stars by Size, Color and Life Cycle

Learn to identify the different sizes and colors of stars and how they relate to the star life cycle. In this lesson, we'll talk about spectral classification, how many stars there are of each type and the approximate color of the different classes of stars.

Inner Planets of the Solar System: Mercury, Venus, Earth & Mars

3. Inner Planets of the Solar System: Mercury, Venus, Earth & Mars

Take a tour of the four inner planets: Mercury, Venus, Earth and Mars. Known as the terrestrial planets, find out what makes each of them unique and how they are different from the outer planets, the gas giants.

Outer Planets of the Solar System: Jupiter, Saturn, Uranus, Neptune

4. Outer Planets of the Solar System: Jupiter, Saturn, Uranus, Neptune

Take a tour of the outer planets of our solar system: Jupiter, Saturn, Uranus, and Neptune. Find out what makes each of these gas giants unique and learn about Pluto, a dwarf planet.

Dwarf Planets of the Solar System: Pluto, Eris, Haumea & Ceres

5. Dwarf Planets of the Solar System: Pluto, Eris, Haumea & Ceres

Discover why Pluto had to leave the league of planets and was downgraded to a dwarf planet. Learn the definitions for planet and dwarf planet. Find out about the currently classified dwarf planets in our solar system: Pluto, Eris, Ceres, Haumea and Makemake.

Galaxy: Definition & Explanation

6. 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.

Galaxy Formation: Spiral, Elliptical & Irregular Galaxies

7. 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.

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

8. 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.

Life Cycle of Black Holes

9. Life Cycle of Black Holes

Learn about black holes, their myths and their reality. Learn how black holes form after stars undergo supernovae and create singularities. Discover how big black holes grow, how scientists find black holes and where black holes are located in the universe.

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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