# Intro to Astronomy: Help and Review

• Course type: Self-paced
• Available Lessons: 358
• Average Lesson Length: 8 min
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The Scientific Field of Astronomy

• Intro to Astronomy: Help and Review Practice Test

### 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
Week {{::cp.getGoalWeekForTopic(3, 28)}}
Week {{::cp.getGoalWeekForTopic(4, 28)}}
Course Progress Best Score
Lesson 1 - Newton's First Law of Motion: Examples of the Effect of Force on Motion
Lesson 2 - Distinguishing Between Inertia and Mass
Lesson 3 - Mass and Weight: Differences and Calculations
Lesson 4 - State of Motion and Velocity
Lesson 5 - Force: Definition and Types
Lesson 6 - Forces: Balanced and Unbalanced
Lesson 7 - Free-Body Diagrams
Lesson 8 - Net Force: Definition and Calculations
Lesson 9 - Newton's Second Law of Motion: The Relationship Between Force and Acceleration
Lesson 10 - Determining the Acceleration of an Object
Lesson 11 - Determining the Individual Forces Acting Upon an Object
Lesson 12 - Air Resistance and Free Fall
Lesson 13 - Newton's Third Law of Motion: Examples of the Relationship Between Two Forces
Lesson 14 - Newton's Laws and Weight, Mass & Gravity
Lesson 15 - Identifying Action and Reaction Force Pairs
Lesson 16 - The Normal Force: Definition and Examples
Lesson 17 - Friction: Definition and Types
Lesson 18 - The Law of Universal Gravitation: Definition, Importance & Examples
Lesson 19 - Newton's Law of Gravitation: Definition & Examples
Lesson 20 - Work as an Integral
Lesson 21 - Gravitational Potential Energy: Definition, Formula & Examples
Lesson 22 - Gravitational Attraction of Extended Bodies
Week {{::cp.getGoalWeekForTopic(10, 28)}}
Course Progress Best Score
Lesson 1 - Formation of the Moon: Theories
Lesson 2 - Measuring Objects in the Sky: Angular Size & Distance
Lesson 3 - Important Points on the Celestial Sphere
Lesson 4 - The Cycle of the Seasons in Astronomy
Lesson 5 - Geography of the Four Seasons
Lesson 6 - The Horizon Coordinate System
Lesson 7 - The Equatorial Coordinate System
Lesson 8 - What is Precession?
Lesson 9 - Lunar Eclipse: Definition & Types
Lesson 10 - What Is a Solar Eclipse?
Lesson 11 - Annular Eclipse: The Changing Size of the Moon
Lesson 12 - How Can We Predict An Eclipse?
Lesson 13 - Why the Sun Changes Color
Lesson 14 - Magnetosphere: Definition & Facts
Lesson 15 - How Gravity, the Moon & the Sun Influence Tides
Lesson 16 - Tidal Friction: Effects on Earth & the Moon
Lesson 17 - Celestial Equator: Definition & Use
Lesson 18 - First Quarter Moon: Definition & Summary
Lesson 19 - Full Moon: Definition, Facts & Features
Lesson 20 - What is a Waxing Moon? - Definition, Facts & Phase
Lesson 21 - What is an Equinox? - Definition & Types
Lesson 22 - What is the Summer Solstice? - Definition & Facts
Lesson 23 - What is the Vernal Equinox? - Definition & Facts
Lesson 24 - Why Does the Moon have Phases?
Lesson 25 - What is a Waning Moon? - Definition, Facts & Phases
Week {{::cp.getGoalWeekForTopic(18, 28)}}
Week {{::cp.getGoalWeekForTopic(25, 28)}}
Course Progress Best Score
Lesson 1 - The Cosmological Principle
Lesson 2 - How To Calculate the Age of the Universe
Lesson 3 - Photons, Particle Soup & Nucleosynthesis
Lesson 4 - Olbers' Paradox & Cosmic Expansion: Nature of the Universe
Lesson 5 - Solar System, Galaxy, & Universe: Definitions & Difference
Lesson 6 - The Steady State Theory vs. the Big Bang Theory
Lesson 7 - The Observable Universe vs. the Entire Universe
Lesson 8 - Comparing the Human Lifetime to the Universe
Lesson 9 - The Basic Nature of Life
Lesson 10 - Three Models of the Universe: Flat, Open & Closed
Lesson 11 - Hot & Cold Dark Matter & WIMPs
Lesson 12 - The Universe's Curvature, Age & Fate
Lesson 13 - The Origin of Life on Earth: Theories and Explanations
Lesson 14 - The History of Life on Earth: Timeline and Characteristics of Major Eras
Lesson 15 - Geologic Time Scale: Major Eons, Eras, Periods and Epochs
Lesson 16 - Theories of Evolution: Lamarck vs. Darwin
Lesson 17 - Natural Selection & Adaptation: Definition, Theory & Examples
Lesson 18 - Natural Selection: Definition, Types & Examples
Lesson 19 - Planetary Predictors of Extraterrestrial Life
Lesson 21 - The Evolution of the Early Universe
Lesson 22 - Cosmic Inflation: Solving the Flatness & Horizon Problems
Lesson 23 - The Acceleration of the Universe
Lesson 24 - Intelligent Life in Our Universe
Lesson 25 - Is There Life on Other Planets?
Lesson 26 - Stanley Miller: Theory, Experiment & Apparatus

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Practice Tests in this course
Check your knowledge of this course with a 50-question practice test. Once you take the test, you will receive a detailed exam report complete with your personal statistics and even specific lessons to focus on! Take the practice test now
Your detailed study guide will include:
• Answers and detailed explanations to each question
• Video lessons to explain complicated concepts
Course Practice Test
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