Intro to Astronomy: Help and Review

Course Summary

Improve your knowledge of fundamental astronomy concepts with our engaging and self-paced Intro to Astronomy: Help and Review course. These short lessons and quizzes can help you quickly bring up your astronomy grades, finish homework assignments or get ready for upcoming exams.
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28 chapters in Intro to Astronomy: Help and Review

Course Practice Test

Check your knowledge of this course with a 50-question practice test.
  • Comprehensive test covering all topics
  • Detailed video explanations for wrong answers
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Ch 1. The History of Astronomy: Help and Review {{cp.topicAssetIdToProgress[23992].percentComplete}}% complete
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Course Progress Best Score
Lesson 1 - The Nature of Light: Origin, Spectrum & Color Frequency  Take Quiz
Lesson 2 - Electromagnetic Waves: Definition, Sources & Properties  Take Quiz
Lesson 3 - The 7 Major Regions of the Electromagnetic Spectrum  Take Quiz
Lesson 4 - Reflection: Angle of Incidence and Curved Surfaces  Take Quiz
Lesson 5 - Resonance: Definition & Transmission of Waves  Take Quiz
Lesson 6 - Transparent and Opaque Materials in Electromagnetic Waves  Take Quiz
Lesson 7 - Color: White Light, Reflection & Absorption  Take Quiz
Lesson 8 - Refraction & Dispersion: Definition, Snell's Law & Index of Refraction  Take Quiz
Lesson 9 - Diffraction: Relation to Sound & Light and Effects of Wavelength  Take Quiz
Lesson 10 - Wave-Particle Duality: Concept, Explanation & Examples  Take Quiz
Lesson 11 - Wave Parameters: Wavelength, Amplitude, Period, Frequency & Speed  Take Quiz
Lesson 12 - What is Light?  Take Quiz
Lesson 13 - What is a Photon? - Definition, Energy & Wavelength  Take Quiz
Lesson 14 - The Speed of Light: Distance & Light-Years  Take Quiz
Lesson 15 - Quantum Physics: Definition, Theories & Topics  Take Quiz
Lesson 16 - How Light & Matter Interact  Take Quiz
Lesson 17 - Blackbody & Blackbody Radiation Theory  Take Quiz
Lesson 18 - What Are Wien's Law & the Stefan-Boltzmann Law?  Take Quiz
Lesson 19 - Calculations with Wien's Law & the Stefan-Boltzmann Law  Take Quiz
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Course Progress Best Score
Lesson 1 - Newton's First Law of Motion: Examples of the Effect of Force on Motion  Take Quiz
Lesson 2 - Distinguishing Between Inertia and Mass  Take Quiz
Lesson 3 - Mass and Weight: Differences and Calculations  Take Quiz
Lesson 4 - State of Motion and Velocity  Take Quiz
Lesson 5 - Force: Definition and Types  Take Quiz
Lesson 6 - Forces: Balanced and Unbalanced  Take Quiz
Lesson 7 - Free-Body Diagrams  Take Quiz
Lesson 8 - Net Force: Definition and Calculations  Take Quiz
Lesson 9 - Newton's Second Law of Motion: The Relationship Between Force and Acceleration  Take Quiz
Lesson 10 - Determining the Acceleration of an Object  Take Quiz
Lesson 11 - Determining the Individual Forces Acting Upon an Object  Take Quiz
Lesson 12 - Air Resistance and Free Fall  Take Quiz
Lesson 13 - Newton's Third Law of Motion: Examples of the Relationship Between Two Forces  Take Quiz
Lesson 14 - Newton's Laws and Weight, Mass & Gravity  Take Quiz
Lesson 15 - Identifying Action and Reaction Force Pairs  Take Quiz
Lesson 16 - The Normal Force: Definition and Examples  Take Quiz
Lesson 17 - Friction: Definition and Types  Take Quiz
Lesson 18 - The Law of Universal Gravitation: Definition, Importance & Examples  Take Quiz
Lesson 19 - Newton's Law of Gravitation: Definition & Examples  Take Quiz
Lesson 20 - Work as an Integral  Take Quiz
Lesson 21 - Gravitational Potential Energy: Definition, Formula & Examples  Take Quiz
Lesson 22 - Gravitational Attraction of Extended Bodies  Take Quiz
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Course Progress Best Score
Lesson 1 - Formation of the Moon: Theories  Take Quiz
Lesson 2 - Measuring Objects in the Sky: Angular Size & Distance  Take Quiz
Lesson 3 - Important Points on the Celestial Sphere  Take Quiz
Lesson 4 - The Cycle of the Seasons in Astronomy  Take Quiz
Lesson 5 - Geography of the Four Seasons  Take Quiz
Lesson 6 - The Horizon Coordinate System  Take Quiz
Lesson 7 - The Equatorial Coordinate System  Take Quiz
Lesson 8 - What is Precession?  Take Quiz
Lesson 9 - Lunar Eclipse: Definition & Types  Take Quiz
Lesson 10 - What Is a Solar Eclipse?  Take Quiz
Lesson 11 - Annular Eclipse: The Changing Size of the Moon  Take Quiz
Lesson 12 - How Can We Predict An Eclipse?  Take Quiz
Lesson 13 - Why the Sun Changes Color  Take Quiz
Lesson 14 - Magnetosphere: Definition & Facts  Take Quiz
Lesson 15 - How Gravity, the Moon & the Sun Influence Tides  Take Quiz
Lesson 16 - Tidal Friction: Effects on Earth & the Moon  Take Quiz
Lesson 17 - Celestial Equator: Definition & Use  Take Quiz
Lesson 18 - First Quarter Moon: Definition & Summary  Take Quiz
Lesson 19 - Full Moon: Definition, Facts & Features  Take Quiz
Lesson 20 - What is a Waxing Moon? - Definition, Facts & Phase  Take Quiz
Lesson 21 - What is an Equinox? - Definition & Types  Take Quiz
Lesson 22 - What is the Summer Solstice? - Definition & Facts  Take Quiz
Lesson 23 - What is the Vernal Equinox? - Definition & Facts  Take Quiz
Lesson 24 - Why Does the Moon have Phases?  Take Quiz
Lesson 25 - What is a Waning Moon? - Definition, Facts & Phases  Take Quiz
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Course Progress Best Score
Lesson 1 - Red Giant, Horizontal & Asymptotic Giant Branch Stars  Take Quiz
Lesson 2 - Life Cycle of Neutron Stars  Take Quiz
Lesson 3 - Binary Pulsars & Pulsar Planets  Take Quiz
Lesson 4 - Cosmic Rays: Definition & Origin  Take Quiz
Lesson 5 - What Are White Dwarfs? - Stellar Remnant Characteristics  Take Quiz
Lesson 6 - Giant Stars and Helium Fusion  Take Quiz
Lesson 7 - How Lower-Main-Sequence Stars Die  Take Quiz
Lesson 8 - What Are Planetary Nebulae?  Take Quiz
Lesson 9 - Helium Fusion and Degenerate Electron Pressure  Take Quiz
Lesson 10 - Binary Systems and Novae  Take Quiz
Lesson 11 - How Massive Stars Begin To Die  Take Quiz
Lesson 12 - What are Neutron Stars and Supernova Remnants?  Take Quiz
Lesson 13 - The Different Types of Supernovae  Take Quiz
Lesson 14 - Supernova: How Massive Stars Explode  Take Quiz
Lesson 15 - What Are Pulsars?  Take Quiz
Lesson 16 - Life Cycle of Black Holes  Take Quiz
Lesson 17 - Black Holes: Escape Velocity and the Singularity  Take Quiz
Lesson 18 - Black Holes: the Event Horizon and Schwarzschild Radius  Take Quiz
Lesson 19 - Finding and Leaping into Black Holes  Take Quiz
Lesson 20 - The Origin of Gamma-ray Bursts  Take Quiz
Lesson 21 - Cosmic Recycling: From Stellar Death to Human Life  Take Quiz
Lesson 22 - Life Cycle of a Star Project Ideas
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Course Progress Best Score
Lesson 1 - The Cosmological Principle  Take Quiz
Lesson 2 - How To Calculate the Age of the Universe  Take Quiz
Lesson 3 - Photons, Particle Soup & Nucleosynthesis  Take Quiz
Lesson 4 - Olbers' Paradox & Cosmic Expansion: Nature of the Universe  Take Quiz
Lesson 5 - Solar System, Galaxy, & Universe: Definitions & Difference  Take Quiz
Lesson 6 - The Steady State Theory vs. the Big Bang Theory  Take Quiz
Lesson 7 - The Observable Universe vs. the Entire Universe  Take Quiz
Lesson 8 - Comparing the Human Lifetime to the Universe  Take Quiz
Lesson 9 - The Basic Nature of Life  Take Quiz
Lesson 10 - Three Models of the Universe: Flat, Open & Closed  Take Quiz
Lesson 11 - Hot & Cold Dark Matter & WIMPs  Take Quiz
Lesson 12 - The Universe's Curvature, Age & Fate  Take Quiz
Lesson 13 - The Origin of Life on Earth: Theories and Explanations  Take Quiz
Lesson 14 - The History of Life on Earth: Timeline and Characteristics of Major Eras  Take Quiz
Lesson 15 - Geologic Time Scale: Major Eons, Eras, Periods and Epochs  Take Quiz
Lesson 16 - Theories of Evolution: Lamarck vs. Darwin  Take Quiz
Lesson 17 - Natural Selection & Adaptation: Definition, Theory & Examples  Take Quiz
Lesson 18 - Natural Selection: Definition, Types & Examples  Take Quiz
Lesson 19 - Planetary Predictors of Extraterrestrial Life  Take Quiz
Lesson 20 - Space Mission Types: Advantages & Disadvantages  Take Quiz
Lesson 21 - The Evolution of the Early Universe  Take Quiz
Lesson 22 - Cosmic Inflation: Solving the Flatness & Horizon Problems  Take Quiz
Lesson 23 - The Acceleration of the Universe  Take Quiz
Lesson 24 - Intelligent Life in Our Universe  Take Quiz
Lesson 25 - Is There Life on Other Planets?  Take Quiz
Lesson 26 - Stanley Miller: Theory, Experiment & Apparatus  Take Quiz

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Practice Tests in this course
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