About This Chapter
How it works:
- Begin your assignment or other GED science work.
- Identify the astronomy concepts that you're stuck on.
- Find fun videos on the topics you need to understand.
- Press play, watch and learn!
- Complete the quizzes to test your understanding.
- As needed, submit a question to one of our instructors for personalized support.
Who's it for?
This chapter of our GED science tutoring solution will benefit any student who is trying to learn astronomy and earn better grades. This resource can help students including those who:
- Struggle with understanding the Big Bang Theory, star formation, life cycle of the sun, outer planets, moon formation theories or any other astronomy topic
- Have limited time for studying
- Want a cost effective way to supplement their science learning
- Prefer learning science visually
- Find themselves failing or close to failing their astronomy unit
- Cope with ADD or ADHD
- Want to get ahead in GED science
- Don't have access to their science teacher outside of class
Why it works:
- Engaging Tutors: We make learning astronomy simple and fun.
- Cost Efficient: For less than 20% of the cost of a private tutor, you'll have unlimited access 24/7.
- Consistent High Quality: Unlike a live GED science tutor, these video lessons are thoroughly reviewed.
- Convenient: Imagine a tutor as portable as your laptop, tablet or smartphone. Learn astronomy on the go!
- Learn at Your Pace: You can pause and rewatch lessons as often as you'd like, until you master the material.
- Explain the Big Bang theory.
- Learn how stars are formed.
- Describe the different types of telescope.
- Understand how galaxies form.
- Identify the different types of stars.
- List the stages of the sun's life cycle.
- Become familiar with the life cycle stages of supergiant, supernova and neutron stars.
- Compare and contrast the inner planets, outer planets and dwarf planets of the solar system.
- Take a look at theories for the formation of Earth and the moon.
- Understand the planetary conditions necessary to support life.
- Describe the characteristics of comets, asteroids and meteorites.
- Discuss the history of space travel.
1. The Scientific Field of Astronomy
Space is a large and exciting place, full of things we have yet to discover. Astronomy aims to uncover the mysteries of space, something people have been fascinated with as long as they have been on Earth.
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. 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.
4. Star Formation: Main Sequence, Dwarf & Giant Stars
Learn how stars are born, beginning with a protostar. Then learn about stars in later stages of life, including main sequence stars, brown dwarfs, red giants, and black holes.
5. Types of Telescopes: Radio, Reflecting & Refracting Telescopes
Learn about the different types of telescopes that astronomers use: X-ray, radio, gamma ray, reflecting and refracting. Learn what the differences are between them and what different things they show us about the universe.
6. 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.
7. 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.
8. 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.
9. Stages of the Sun's Life Cycle
Discover our Sun, the provider of energy for life on Earth. Learn how the Sun was born, how it lives as a main sequence star, how it will age into a red giant and how it will die as a white dwarf.
10. Supernova and Supergiant Star Life Cycle
Learn about one of the biggest explosions known to humankind - a supernova. Follow a star's life cycle and learn how a star changes from a red giant to a supernova to a black hole or neutron star.
11. Life Cycle of Neutron Stars
Discover the life of a neutron star, including how it's born after a supernova explosion and how its extreme pressure causes protons and electrons to combine into neutrons. Discover also how pulsars are rotating neutron stars that will eventually slow down to become regular neutron stars.
12. 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.
13. 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.
14. Formation of the Earth: Theories
In this lesson, the theory of how the planet Earth formed will be discussed. This includes looking at how it differentiated into three layers, how it formed its atmosphere, water, and land features, and how it continues to evolve today.
15. Formation of the Moon: Theories
Explore the four major theories on the formation of the Moon. The theories include the fission theory, capture theory, condensation theory and giant impact theory. Also look at both information supporting and flaws found in these theories.
16. Planetary Predictors of Extraterrestrial Life
Investigate what is needed for life to exist anywhere and the implications for life in our solar system beyond Earth. Consider Mars and some of the moons of Jupiter and Saturn, including Europa, Callisto, Ganymede and Enceladus.
17. 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.
18. 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.
19. Asteroids, Meteorites & Comets: Definitions and Characteristics
This lesson will cover the definitions and characteristics of asteroids, comets and meteorites. It will also explore what impact they have had on Earth and the impact they might have in the future.
20. Space Travel: History, Dangers & Benefits
Space is fascinating. Humans have been sending objects into space for decades, trying to learn about Earth and what's beyond. But while space travel can be beneficial, there are also risks that come along with exploring the rest of the universe.
21. Betelgeuse: Facts & Size
You don't need a super giant brain to learn about this red supergiant star. Betelgeuse, of the Orion constellation, won't be around forever; so, play it safe and learn about it now.
22. 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.
23. Main-Sequence Star: Definition & Facts
A main sequence star is a star that is in the longest stage of its life. In this lesson, you will learn the characteristics of this phase, how it starts, and how it ends.
24. 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.
25. Red Supergiant: Definition, Facts & Life Cycle
This lesson defines red supergiants and provides some interesting facts and life cycle information. Check your knowledge with a quiz that follows the lesson.
26. Space Station: Definition & History
The International Space Station is an orbiting spacecraft where scientists live for extended periods of time while doing research. Learn more about this structure and test your knowledge with a quiz following the lesson.
27. Stars: Definition & Facts
Before you name a star after someone, get the facts! Stars are a lot more than pretty lights up in the sky. Read on for a basic dose of nuclear fusion, main sequence stars, red giants, and more.
28. Supergiant Star: Definition & Facts
Our sun is a star, but did you know that it is an average star? The universe is home to many different kinds of stars including the supergiants, stars that are up to 12 times as massive as our little star.
29. What are Asteroids? - Facts & Explanation
Millions of asteroids dot our solar system, bumping and crashing into each other as they orbit the sun. This lesson will define and describe the properties of asteroids and how they have shaped the Earth.
30. What are Planets? - Facts & Definition
In this lesson, you'll learn the official definition of a planet, how planets are formed, and about the two types of planets found in our solar system: terrestrial planets and gas giants.
31. What is a New Moon? - Definition & Phases
Once, or sometimes twice, a month, the moon disappears from our view. This is called a new moon, and it happens when the illuminated side of the moon faces away from us. You'll learn all about it in this lesson.
32. The Sun's Chromosphere: Definition, Temperature & Facts
In this lesson, we'll learn what the chromosphere is and some facts about it. We'll cover the location in the sun's atmosphere, the temperature and the composition of the layer; you'll also learn what spicules protruding from this layer are.
33. The Sun's Photosphere: Definition & Temperature
This lesson will explain what we mean by the photosphere of the Sun, and describe it's properties, including temperature and pressure. A short quiz will follow.
34. What Is a Blastocyst? - Definition & Development Stages
Development of a blastocyst is a big step for a tiny new organism and makes it possible for more growth and change to come. Learn how to recognize what is happening with the cells of this stage and what it means for the future individual.
35. What is a Constellation? - Definition, Facts, Formation & Examples
In this lesson, you will learn what a constellation is and how it is different to a star cluster. You will also learn how star clusters are formed and go over a few examples of both constellations and star clusters. A short quiz will follow.
36. What is a Lunar Eclipse? - Definition, Facts & Frequency
In this lesson, you will learn what a lunar eclipse is and how frequently lunar eclipses occur. You will also learn facts related to lunar eclipses, which are studied by scientists all over the world.
37. What is a Solar Eclipse? - Definition & Overview
A solar eclipse occurs as the moon passes in front of the sun, resulting in the earth falling into the shadow of the moon. This lesson explains how and why solar eclipses occur.
38. What is an Eclipse? - Definition & Types
This lesson will explain what an eclipse is and the various types of eclipses, particularly from the vantage point of the earth. A short quiz will follow.
39. What is Dark Matter? - Theory & Energy
In this lesson, you will learn what dark matter is and what are the latest theories about the origin of dark matter. You will also learn about dark energy and find out if dark matter and dark energy are related to each other.
40. What is Extraterrestrial Life? - Forms & Signs
This lesson will discuss the possible forms that extraterrestrial life might take, and the signs we could look for to detect extraterrestrial life. A short quiz will follow.
41. What is Orbit? - Planets & Satellites
This lesson talks about what an orbit is and defines some common terms associates with orbit. We also talk specifically about orbits of planets and satellites.
42. What is the Sun? - Facts, Layers & Temperature
The sun is a big ball of gas, and it is responsible for giving us the light and heat we need to survive. Learn about the complex layers of the sun, where that energy and light originates, and the powerfully hot temperatures within our favorite star.
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