Course Summary

Astronomy 101 has been evaluated and recommended for 3 semester hours and may be transferred to over 2,000 colleges and universities. With this self-paced course, you get engaging lessons, expert instructors who make even the most challenging astronomy topics simple, and an excellent resource for getting a head start on your degree.

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20 chapters in Astronomy 101: Intro to Astronomy

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Week {{::cp.getGoalWeekForTopic(0, 20)}}

Ch 1. The Historical Background of Astronomy {{cp.topicAssetIdToProgress[459839].percentComplete}}% complete

	Best Score
Lesson 1 - The Scientific Field of Astronomy	Take Quiz
		Take Quiz
Lesson 2 - Development of Astronomy in Ancient History	Take Quiz
Lesson 3 - Geocentric, Heliocentric & Ptolemaic Models of the Universe	Take Quiz
Lesson 4 - Tycho Brahe and Copernicus Take On the Known Universe	Take Quiz
Lesson 5 - Kepler's Three Laws of Planetary Motion	Take Quiz
Lesson 6 - Galileo, the Telescope & the Church	Take Quiz
Lesson 7 - Telling Time in Ancient Times	Take Quiz

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Ch 2. The Basics of Astronomy {{cp.topicAssetIdToProgress[459843].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - The Horizon Coordinate System			Take Quiz
	Lesson 2 - The Equatorial Coordinate System			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 - Planets of the Solar System: Orbits & Visibility			Take Quiz
	Lesson 6 - What is Precession?			Take Quiz
	Lesson 7 - Measuring Objects in the Sky: Angular Size & Distance			Take Quiz
	Lesson 8 - Lunar Eclipse: Definition & Types			Take Quiz
	Lesson 9 - What Is a Solar Eclipse?			Take Quiz

Week {{::cp.getGoalWeekForTopic(2, 20)}}

Ch 3. The Physics of Astronomy {{cp.topicAssetIdToProgress[459845].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - What is Light?			Take Quiz
	Lesson 2 - The Speed of Light: Distance & Light-Years			Take Quiz
	Lesson 3 - What is a Photon? - Definition, Energy & Wavelength			Take Quiz
	Lesson 4 - The Law of Universal Gravitation: Definition, Importance & Examples			Take Quiz

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Ch 4. Understanding Orbits in Astronomy {{cp.topicAssetIdToProgress[459847].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - The Four Kinds of Trajectories for Celestial Objects			Take Quiz
	Lesson 2 - Eccentricity & Orbits of Planets			Take Quiz
	Lesson 3 - Center of Mass, The Barycenter & Orbital Motion			Take Quiz
	Lesson 4 - How Orbits Are Influenced by Gravity & Energy			Take Quiz
	Lesson 5 - Circular Velocity & Escape Velocity			Take Quiz

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Ch 5. The Earth-Moon System {{cp.topicAssetIdToProgress[459849].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Formation of the Earth: Theories			Take Quiz
	Lesson 2 - The Four Spheres of Earth: Geosphere, Hydrosphere, Biosphere, and Atmosphere			Take Quiz
	Lesson 3 - The Structure of the Atmosphere			Take Quiz
	Lesson 4 - Formation of the Moon: Theories			Take Quiz
	Lesson 5 - Lunar Geology: Types of Moon Rocks			Take Quiz
	Lesson 6 - The Moon's Atmosphere			Take Quiz
	Lesson 7 - Moon Phases: Names & Sequence			Take Quiz
	Lesson 8 - How Earth & the Sun Affect the Phases of the Moon			Take Quiz
	Lesson 9 - Motion of the Moon: Sidereal Month vs. Synodic Month			Take Quiz
	Lesson 10 - Predicting When The Moon Will Rise and Set			Take Quiz

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Ch 6. The Solar System {{cp.topicAssetIdToProgress[459851].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Solar System Overview			Take Quiz
	Lesson 2 - The Solar Nebula Theory: Formation of the Solar System			Take Quiz
	Lesson 3 - Solar Nebula Theory & Patterns of Planetary Motion			Take Quiz
	Lesson 4 - What is the Age of the Solar System?			Take Quiz
	Lesson 5 - The Condensation Sequences & Planetary Formation			Take Quiz
	Lesson 6 - What Are Planetesimals?			Take Quiz
	Lesson 7 - How Do Protoplanets Grow?			Take Quiz
	Lesson 8 - What Is the Jovian Problem?			Take Quiz
	Lesson 9 - Major Characteristics of Planets in the Solar System			Take Quiz
	Lesson 10 - Theoretical vs. Actual Temperature in our Solar System			Take Quiz
	Lesson 11 - Planetary Geology: The Study of Celestial Bodies			Take Quiz

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Ch 7. The Inner Solar System {{cp.topicAssetIdToProgress[459853].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Inner Planets of the Solar System: Mercury, Venus, Earth & Mars			Take Quiz
	Lesson 2 - The Surface & Atmosphere on Mars			Take Quiz
	Lesson 3 - The Surface & Atmosphere on Venus			Take Quiz
	Lesson 4 - The Surface & Atmosphere on Mercury			Take Quiz

Week {{::cp.getGoalWeekForTopic(7, 20)}}

Ch 8. Gaseous Planets in the Solar System {{cp.topicAssetIdToProgress[459855].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Outer Planets of the Solar System: Jupiter, Saturn, Uranus, Neptune			Take Quiz
	Lesson 2 - Jupiter's Important Properties			Take Quiz
	Lesson 3 - Saturn's Major Characteristics			Take Quiz
	Lesson 4 - Jupiter's & Saturn's Magnetospheres			Take Quiz
	Lesson 5 - Uranus's Moons, Rings, Atmosphere & Rotation			Take Quiz
	Lesson 6 - Neptune's Moons, Rings, Atmosphere & Temperature			Take Quiz

Week {{::cp.getGoalWeekForTopic(8, 20)}}

Ch 9. Comets, Moons & Asteroids {{cp.topicAssetIdToProgress[459857].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Satellite Formation in Our Solar System			Take Quiz
	Lesson 2 - Moons of the Jovian Planets			Take Quiz
	Lesson 3 - Tidal Forces & Heat Transfer on Jovian Satellites			Take Quiz
	Lesson 4 - Meteoroids: Origin & Orbits			Take Quiz
	Lesson 5 - Meteorite Classifications & Characteristics			Take Quiz
	Lesson 6 - Asteroids: Origin & Properties			Take Quiz
	Lesson 7 - Comets: Origin & Properties			Take Quiz
	Lesson 8 - What Are Trans-Neptunian Objects?			Take Quiz
	Lesson 9 - Dwarf Planets of the Solar System: Pluto, Eris, Haumea & Ceres			Take Quiz

Week {{::cp.getGoalWeekForTopic(9, 20)}}

Ch 10. Understanding the Science of the Sun {{cp.topicAssetIdToProgress[459859].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Structure of the Sun			Take Quiz
	Lesson 2 - The Sun: Atmosphere & Facts			Take Quiz
	Lesson 3 - Photosphere: Definition & Features			Take Quiz
	Lesson 4 - Chromosphere: Definition & Properties			Take Quiz
	Lesson 5 - The Solar Corona & Solar Wind			Take Quiz
	Lesson 6 - Solar Flares, Solar Prominences & Coronal Mass Ejections			Take Quiz
	Lesson 7 - Helioseismology & the Heliosphere			Take Quiz
	Lesson 8 - What Are Sunspots?			Take Quiz
	Lesson 9 - Why Do Sunspots Occur?			Take Quiz
	Lesson 10 - The Babcock Model of the Sun's Magnetic Cycle			Take Quiz
	Lesson 11 - Stages of the Sun's Life Cycle			Take Quiz

Week {{::cp.getGoalWeekForTopic(10, 20)}}

Ch 11. Types of Stars in the Universe {{cp.topicAssetIdToProgress[459861].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Types of Stars by Size, Color and Life Cycle			Take Quiz
	Lesson 2 - What is a Main Sequence Star?			Take Quiz
	Lesson 3 - Types of Star Clusters			Take Quiz
	Lesson 4 - What Are Binary Stars?			Take Quiz
	Lesson 5 - Planets Around Distant Stars			Take Quiz
	Lesson 6 - The Constellations: Definition & Name Origins			Take Quiz
	Lesson 7 - The Zodiac Constellations & Their Visibility in the Sky			Take Quiz

Week {{::cp.getGoalWeekForTopic(11, 20)}}

Ch 12. Formation & Evolution of Stars {{cp.topicAssetIdToProgress[459863].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Star Formation: Main Sequence, Dwarf & Giant Stars			Take Quiz
	Lesson 2 - What is the Interstellar Medium?			Take Quiz
	Lesson 3 - Emission, Dark, and Reflection Nebulae			Take Quiz
	Lesson 4 - Young Stellar Objects and Protostellar Disks			Take Quiz
	Lesson 5 - Nuclear Fusion & Star Formation			Take Quiz
	Lesson 6 - Forces Keeping Stars in a Stable Equilibrium			Take Quiz
	Lesson 7 - Giant Stars and Helium Fusion			Take Quiz

Week {{::cp.getGoalWeekForTopic(12, 20)}}

Ch 13. Stellar Death & Remnants {{cp.topicAssetIdToProgress[459865].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - How Lower-Main-Sequence Stars Die			Take Quiz
	Lesson 2 - What Are Planetary Nebulae?			Take Quiz
	Lesson 3 - Red Giant, Horizontal & Asymptotic Giant Branch Stars			Take Quiz
	Lesson 4 - What Are White Dwarfs? - Stellar Remnant Characteristics			Take Quiz
	Lesson 5 - Supernova: How Massive Stars Explode			Take Quiz
	Lesson 6 - The Different Types of Supernovae			Take Quiz
	Lesson 7 - What are Neutron Stars and Supernova Remnants?			Take Quiz
	Lesson 8 - What Are Pulsars?			Take Quiz
	Lesson 9 - Black Holes: Escape Velocity and the Singularity			Take Quiz
	Lesson 10 - The Origin of Gamma-ray Bursts			Take Quiz
	Lesson 11 - Cosmic Recycling: From Stellar Death to Human Life			Take Quiz
	Lesson 12 - Cosmic Rays: Definition & Origin			Take Quiz

Week {{::cp.getGoalWeekForTopic(13, 20)}}

Ch 14. Formation & Structure of the Milky Way {{cp.topicAssetIdToProgress[459867].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - The Formation of the Milky Way Galaxy			Take Quiz
	Lesson 2 - How Our Galaxy Was Discovered			Take Quiz
	Lesson 3 - The Structure of Our Galaxy			Take Quiz
	Lesson 4 - The Nucleus of a Galaxy			Take Quiz
	Lesson 5 - The Spiral Arms of the Milky Way Galaxy			Take Quiz
	Lesson 6 - Population I and Population II Stars			Take Quiz
	Lesson 7 - The Mass of Our Galaxy			Take Quiz

Week {{::cp.getGoalWeekForTopic(14, 20)}}

Ch 15. Properties & Characteristics of Galaxies {{cp.topicAssetIdToProgress[459869].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - The Collision & Assembly of Galaxies			Take Quiz
	Lesson 2 - The Distribution of Galaxy Properties Along the Hubble Tuning Fork			Take Quiz
	Lesson 3 - Types of Spiral Galaxies			Take Quiz
	Lesson 4 - Galaxy Collisions: Ring & Elliptical Galaxies			Take Quiz
	Lesson 5 - Links in the Cosmic Distance Ladder			Take Quiz
	Lesson 6 - Hubble's Law & Hubble's Constant			Take Quiz
	Lesson 7 - Measuring the Properties of Distant Galaxies			Take Quiz
	Lesson 8 - Characteristics of Stars' Orbits in the Galaxy			Take Quiz
	Lesson 9 - Dark Matter & Gravitational Lensing			Take Quiz
	Lesson 10 - What Are the Different Types of Galaxy Clusters?			Take Quiz
	Lesson 11 - What are Active Galactic Nuclei?			Take Quiz
	Lesson 12 - Seyfert Galaxies & Double-Lobed Radio Galaxies			Take Quiz
	Lesson 13 - What Are Quasars?			Take Quiz
	Lesson 14 - What Are Supermassive Black Holes?			Take Quiz

Week {{::cp.getGoalWeekForTopic(15, 20)}}

Ch 16. Cosmology Overview {{cp.topicAssetIdToProgress[459871].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Origins of the Universe: The Big Bang and Expanding & Contracting Universes			Take Quiz
	Lesson 2 - Evidence for the Big Bang Theory: Background Radiation, Red-Shift and Expansion			Take Quiz
	Lesson 3 - Olbers' Paradox & Cosmic Expansion: Nature of the Universe			Take Quiz
	Lesson 4 - The Observable Universe vs. the Entire Universe			Take Quiz
	Lesson 5 - Photons, Particle Soup & Nucleosynthesis			Take Quiz
	Lesson 6 - The Evolution of the Early Universe			Take Quiz
	Lesson 7 - The Cosmological Principle			Take Quiz
	Lesson 8 - Three Models of the Universe: Flat, Open & Closed			Take Quiz
	Lesson 9 - Hot & Cold Dark Matter & WIMPs			Take Quiz
	Lesson 10 - Cosmic Inflation: Solving the Flatness & Horizon Problems			Take Quiz
	Lesson 11 - The Acceleration of the Universe			Take Quiz
	Lesson 12 - The Universe's Curvature, Age & Fate			Take Quiz
	Lesson 13 - How To Calculate the Age of the Universe			Take Quiz

Week {{::cp.getGoalWeekForTopic(16, 20)}}

Ch 17. Relativity in Space & Time {{cp.topicAssetIdToProgress[459873].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Classical Relativity: Distance and Time Relation to the Observer			Take Quiz
	Lesson 2 - General and Special Relativity: Theory and Examples			Take Quiz
	Lesson 3 - Light and Relativity: Breakdown of Classical Relativity with Light Example			Take Quiz
	Lesson 4 - Time Dilation: Description, Explanation & Examples			Take Quiz
	Lesson 5 - Space Contraction: Shortening Distance for Fast Moving Objects			Take Quiz
	Lesson 6 - Mass and Energy: Description and Interchangeable Relationship			Take Quiz

Week {{::cp.getGoalWeekForTopic(17, 20)}}

Ch 18. Overview of Life in the Universe {{cp.topicAssetIdToProgress[459875].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - The Basic Nature of Life			Take Quiz
	Lesson 2 - Comparing the Human Lifetime to the Universe			Take Quiz
	Lesson 3 - The Origin of Life on Earth: Theories and Explanations			Take Quiz
	Lesson 4 - Intelligent Life in Our Universe			Take Quiz
	Lesson 5 - Is There Life on Other Planets?			Take Quiz
	Lesson 6 - Planetary Predictors of Extraterrestrial Life			Take Quiz

Week {{::cp.getGoalWeekForTopic(18, 20)}}

Ch 19. Tools & Instruments for Astronomy {{cp.topicAssetIdToProgress[459877].percentComplete}}% complete

			Course Progress	Best Score
	Lesson 1 - Types of Telescopes: Radio, Reflecting & Refracting Telescopes			Take Quiz
	Lesson 2 - Refracting & Reflecting Telescopes: Key Concepts			Take Quiz
	Lesson 3 - Telescopes: Powers & Limitations			Take Quiz
	Lesson 4 - How Telescopes Detect & Measure Light			Take Quiz
	Lesson 5 - Radio Telescopes & Interferometry			Take Quiz
	Lesson 6 - Factors That Hinder Astronomical Observations on Earth			Take Quiz

Week {{::cp.getGoalWeekForTopic(19, 20)}}

Ch 20. Studying for Astronomy 101 {{cp.topicAssetIdToProgress[490071].percentComplete}}% complete

			Course Progress	Best Score
	Flashcards - Comets, Moons & Asteroids Flashcards
	Flashcards - Cosmology Flashcards
	Flashcards - Formation & Evolution of Stars Flashcards
	Flashcards - Formation & Structure of the Milky Way Flashcards
	Flashcards - Gaseous Planets & Life in the Universe Flashcards
	Flashcards - Properties & Characteristics of Galaxies Flashcards
	Flashcards - Relativity & Stellar Death Flashcards
	Flashcards - Basics of Astronomy Flashcards
	Flashcards - Earth-Moon System Flashcards
	Flashcards - History, Physics & Tools of Astronomy Flashcards
	Flashcards - Inner & Outer Solar System Flashcards
	Flashcards - Types of Orbits & Stars Flashcards
	Flashcards - Science of the Sun Flashcards

Course Objective

The course objective is for you to get a sense of the universe's enormity and discover the infinitesimal portion of history occupied by human existence.

Grading Policy

Your grade for this course will be calculated out of 300 points. The minimum score required to pass and become eligible for college credit for this course is 210 points, or an overall course grade of 70%. The table below shows how your overall grade will be calculated.

	Possible Points
Quizzes	100
Proctored Final Exam	200
Total	300

Quizzes

Quizzes are meant to test your comprehension of each lesson as you progress through the course. Here's a breakdown of how you will be graded on quizzes and how they'll factor into your final score:

You will have 3 attempts to take each quiz for a score.
The highest score of your first 3 attempts will be recorded as your score for each quiz.
When you've completed the course, the highest scores from your first 3 attempts at each quiz will be averaged together and weighed against the total possible points for quizzes. For instance, if your average quiz score is 85%, you'll receive 85 out of 100 possible points for quizzes.
After your initial 3 attempts, you can take a quiz for practice as many times as you'd like.
You will need to pass each quiz with a score of at least 80% to earn course progress for the lesson. However, it is not necessary to earn 80% within the first three quiz attempts.

Proctored Final Exam

The proctored final exam is a cumulative test designed to ensure that you've mastered the material in the course.

You'll earn points equivalent to the percentage grade you receive on your proctored final. (So if you earn 90% on the final, that's 90 points toward your final grade.)
If you're unsatisfied with your score on the exam, you'll be eligible to retake the exam after a 3-day waiting period.
You can only retake the exam twice, so be sure to use your study guide and fully prepare yourself before you take the exam again.

Items Allowed on Study.com Proctored Exam for Astronomy 101:

Blank scratch paper
Pen or pencil

Items NOT Allowed on Study.com Proctored Exam for Astronomy 101:

Office programs, web browsers, or any programs other than Software Secure (including Study.com lessons)
Textbooks (digital or physical)
Mobile phones, headphones, speakers, TVs, or radios
Notebooks or notes
Any calculators

Course Outcomes

Upon completion of the course, you will be able to:

Identify contributions and major theories related to the study of astronomy in ancient and modern times; Describe the basic features and motions of the night sky.
Identify and describe the theories related to the beginning, evolution and fate of the Universe; Explain how galaxies, including the Milky Way, are formed and distributed; Identify types of galaxies and their properties.
Describe the formation and evolution of the solar system and its planets and bodies; Identify and describe the major characteristics of the Sun, planets, moons, and small bodies in the solar system, including meteoroids, asteroids, and comets.
Describe the formation, evolution, and death cycle of a variety of different star types.
Identify theories related to the origin of life and describe predictors of life on other planets.
Describe the physics of light and the electromagnetic spectrum and explain how telescopes can be used to detect and study both

Prerequisites

There are no prerequisites for this course.

Course Format

Astronomy 101 consists of short video lessons that are organized into topical chapters. Each video is approximately 5-10 minutes in length and comes with a quick quiz to help you measure your learning. The course is completely self-paced. Watch lessons on your schedule whenever and wherever you want.

At the end of each chapter, you can complete a chapter test to see if you're ready to move on or have some material to review. Once you've completed the entire course, take the practice test and use the study tools in the course to prepare for the proctored final exam. You may take the proctored final exam whenever you are ready.

How Credit Recommendations Work

This course has been evaluated and recommended by both ACE and NCCRS for 3 semester hours in the lower division baccalaureate degree category. To apply for transfer credit, follow these steps:

If you already have a school in mind, check with the registrar to see if the school will grant credit for courses recommended by either ACE or NCCRS.
Complete Astronomy 101 by watching video lessons and taking short quizzes.
Take the Astronomy 101 final exam directly on the Study.com site.
Request a transcript to be sent to the accredited school of your choice!
Check out this page for more information on Study.com's credit-recommended courses.

Additional Information

Course Topics

Category	Objectives
The Historical Background of Astronomy	Examines how ancient peoples used astronomical objects to tell time. Describes the scientific field of astronomy and how astronomy developed in ancient history. Differentiates between models of the universe, and explores the contributions of Kepler, Brahe and Galileo.
The Basics of Astronomy	Discusses the horizon and equatorial coordinate systems and planets of the solar system. Defines precession and the lunar and solar eclipse. Describes the cycle of the seasons in astronomy and important points on the celestial sphere.
The Physics of Astronomy	Provides definitions and descriptions of light, photons, the law of universal gravitation and the speed of light.
Understanding Orbits in Astronomy	Teaches ways orbits are influenced by gravity and energy, and explains of orbits of the planets, trajectories for celestial objects and differences between circular and escape velocity.
The Earth-Moon System	Explains Earth's formation and four spheres, the structure of the atmosphere and the moon's formation, rocks, motion, atmosphere and phases.
The Solar System	Introduces solar nebula theory, the solar system's layout and characteristics as well as methods for determining its age. Teaches what caused planets to form, and describes planetisimals, the Jovian problem and planetary geology.
The Inner Solar System	Describes the inner planets of the solar system and the surface and atmosphere on Mercury, Venus and Mars.
Gaseous Planets in the Solar System	Discusses outer planets of the solar system. Explains the properties of Jupiter, characteristics of Saturn and moons and atmosphere of Uranus and Neptune.
Comets, Moons & Asteroids	Examines how satellites are formed, and lists characteristics of asteroids, meteoroids and comets. Identifies moons of the Jovian planets, classifications of meteorites and dwarf planets of the solar system.
Understanding the Science of the Sun	Teaches about the sun's structure, atmosphere and life cycle. Defines the photosphere and chromosphere, and discusses sunspots, helioseismology and the heliosphere. Provides details about the solar corona, solar wind, solar flares and solar prominences.
Types of Stars in the Universe	Lists types of stars and star clusters, and defines main sequence and binary stars. Describes the planets around distant stars, constellations and zodiac constellations.
Formation & Evolution of Stars	Details how stars form, and provides a description of the interstellar medium. Examines different types of nebulae, young stellar objects and protostellar disks, giant stars and forces keeping stars in a stable equilibrium.
Stellar Death & Remnants	Educates on the definitions of planetary nebulae, white dwarfs, pulsars, cosmic rays, neutron stars and supernova remnants. Explains how lower-main-sequence stars die, and describes the origin of gamma-ray burst and cosmic recycling.
Formation & Structure of the Milky Way	Outlines how the Milky Way galaxy formed and it was discovered. Describes the structure and mass of our galaxy, nucleus of a galaxy and differences between population I and II stars.
Properties & Characteristics of Galaxies	Introduces Hubble's law and Hubble's constant, dark matter, quasars and supermassive black holes. Discusses the collision of galaxies and distribution of galaxy properties, and describes types of spiral galaxies and galaxy clusters. Teaches about active galactic nuclei and how to measure the properties of distant galaxies.
Cosmology Overview	Shares facts about the origins of the universe, evidence for the Big Bang theory, the cosmological principle, cosmic inflation and three models of the universe. Distinguishes between the observable universe and entire universe, and describes the evolution of the early universe.
Relativity in Space & Time	Defines classical, general and special relativity. Discusses time dilation, space contradiction and the relationship between mass and energy.
Overview of Life in the Universe	Examines the basic nature of life and origin of life on Earth. Examines intelligent life in the universe and planetary predictors of extraterrestrial life. Compares the human lifetime to the lifespan of the universe.
Tools & Instruments for Astronomy	Describes types and limitations of telescopes. Explains how telescopes measure and detect light, and outlines factors that hinder astronomical observations on Earth.

College Credit

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Pre-Exam Checklist

Before taking the exam, all of the following requirements must be met:

	A College Accelerator Study.com membership.
	Completed all lessons in Astronomy 101: Intro to Astronomy course and achieved 100% Quiz Progress.
	Not attempted to take this exam within the last three days.
	Have available proctored exams in this month of membership.
	Have not taken this exam three times. (0/3)
	Complete the exam readiness quiz.

Start Exam Registration

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Exam Process Details

1. Register For Exam

Registering for the exam is simple. First, be sure you meet the system requirements. Next, you'll need to agree to the academic integrity policy. Then just confirm your name and the exam name, and you're ready to go!

2. Download Software Secure

You'll receive an unique access code. Please write this down — you'll need it to take the exam. Then download Software Secure and follow the installation instructions.

3. Take Exam

The exam contains 50 - 100 multiple choice questions. You will have two hours to complete the exam, so don't start until you're sure you can complete the entire thing. And remember to pace yourself!

4. Get Exam Results

We will send you an email with your official exam results within 1 to 2 weeks. If you would like to raise your grade after receiving your exam results, you can retake quizzes with fewer than 3 attempts. You will then need to retake the final exam.

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Astronomy 101: Intro to Astronomy