Free online courseAstronomy by CrashCourse

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Astronomy

Information from the cosmos in physical and empirical form, a growing search for answers through space. Free online classes to answer questions and apply the knowledge

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CrashCourse
23 Courses / 26955 students

Tons of awesome courses in one awesome channel! Nicole Sweeney teaches you sociology, Carrie Anne Philbin teaches you computer science, Craig Benzine teaches film history, and Mike Rugnetta is teaching mythology!

Course content

Introduction to Astronomy: Crash Course Astronomy #1

Naked Eye Observations: Crash Course Astronomy #2

Cycles in the Sky: Crash Course Astronomy #3

Moon Phases: Crash Course Astronomy #4

Eclipses: Crash Course Astronomy #5

Telescopes: Crash Course Astronomy #6

The Gravity of the Situation: Crash Course Astronomy #7

Tides: Crash Course Astronomy #8

Introduction to the Solar System: Crash Course Astronomy #9

The Sun: Crash Course Astronomy #10

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Course content

0h12m

Introduction to Astronomy: Crash Course Astronomy #1

Welcome to the first episode of Crash Course Astronomy. Your host for this intergalactic adventure is the Bad Astronomer himself, Phil Plait. We begin with answering a question: "What is astronomy?"

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Table of Contents:
What is Astronomy? 3:00
Who Studies Astronomy? 3:50
Origins & Developments 6:52

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

Photos:
http://commons.wikimedia.org/wiki/File:Earth_cutaway.png
http://en.wikipedia.org/wiki/Earth%27s_magnetic_field#mediaviewer/File:Geodynamo_Between_Reversals.gif
http://en.wikipedia.org/wiki/Geomagnetic_storm#mediaviewer/File:Magnetosphere_rendition.jpg
http://en.wikipedia.org/wiki/Saturn#mediaview

0h11m

Naked Eye Observations: Crash Course Astronomy #2

Today on Crash Course Astronomy, Phil invites you to head outside and take a look at all the incredible things you can see with your naked eye.

--

Table of Contents:
Naked Eye Observations 0:28.4
Constellations 3:09.7
The Color of Stars 2:44.5
View of the Stars 7:25

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

PHOTOS
http://www.eso.org/public/images/potw1333a/
http://commons.wikimedia.org/wiki/File:3_Solar_Interstellar_Neighborhood_(ELitU).png
http://www.spacetelescope.org/images/heic0206j/
http://www.spacetelescope.org/images/heic0720c/
http://upload.wikimedia.org/wikipedia/commons/3/36/Orion_tjt.jpg
http://hubblesite.org/newscenter/archive/re

0h09m

Cycles in the Sky: Crash Course Astronomy #3

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.

--

Table of Contents:
Naked Eye Observations 0:28.4
Constellations 3:09.7
The Color of Stars 2:44.5
View of the Stars 7:25

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

PHOTOS
http://en.wikipedia.org/wiki/Right_ascension#mediaviewer/File:Stars_and_ra.png
http://en.wikipedia.org/wiki/File:Ecliptic_path.jpg
http://commons.wikimedia.org/wiki/File:Sagittarius_Hevelius.jpg
http://en.wikipedia.org/wiki/Scorpius#mediaviewer/File:Sidney_Hall_-_Urania%27s_Mirror_-_Scorpio.jpg
http://en.wikipedia.org/wiki/Libra

0h09m

Moon Phases: Crash Course Astronomy #4

In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.

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Why the Moon Has Phases 0:36.1
Spheres in Orbit 1:05.4
Name of the Moon Phases 2:25.5
How We See It 7:48.2

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

PHOTOS
http://en.wikipedia.org/wiki/Moon#mediaviewer/File:FullMoon2010.jpg
https://solarsystem.nasa.gov/multimedia/display.cfm?IM_ID=1879
http://svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0505.jpg
http://svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_30p/moon.0553.jpg
http://svs.gsfc.nasa.gov/vis/a000000/a004200/a004236/frames/730x730_1x1_

0h10m

Eclipses: Crash Course Astronomy #5

The big question in the comments last week was, "BUT WHAT ABOUT ECLIPSES?" Today, Phil breaks 'em down for you.

This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse

--

As promised, Phil's sun spotting recommendations:

Astronomers Without Borders (charitable org): http://store.astronomerswithoutborders.org/index.php?main_page=product_info&cPath=8&products_id=3

Rainbow Symphony glasses (I have these myself): http://www.rainbowsymphony.com/soleclipse.html

Wide variety of viewers from Rainbow Symphony: http://www.eclipseglasses2017.com/buy-eclipse-glasses

--

Solar Eclips 0:59
Lunar Eclipse 1:03
Moon's Orbit 1:23
Size of the Earth and Moon 8:24

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.

0h12m

Telescopes: Crash Course Astronomy #6

Today Phil explains how telescopes work and offers up some astronomical shopping advice.

--

How Telescopes Work 1:07
Refractors vs Reflectors 2:50
Technology and the Light Spectrum 7:45

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

PHOTOS/VIDEOS
http://en.wikipedia.org/wiki/Galileo_Galilei#mediaviewer/File:Justus_Sustermans_-_Portrait_of_Galileo_Galilei,_1636.jpg
http://en.wikipedia.org/wiki/Human_eye#mediaviewer/File:Human_eye_with_blood_vessels.jpg
http://en.wikipedia.org/wiki/Refracting_telescope#mediaviewer/File:Refractor_Cincinnati_observatory.jpg
http://commons.wikimedia.org/wiki/File:Positive_lens_2.svg
http://www.eso.org/public/images/yb

0h10m

The Gravity of the Situation: Crash Course Astronomy #7

In today's episode, Phil looks at how gravity plays out across the universe.

This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse

--

Gravity is a Force 2:17
Different Types of Orbit 3:41
Escape Velocity 5:30
Weightless Mass 7:03

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Patreon: https://www.patreon.com/crashcourse

--

PHOTO/VIDEO CREDITS
First photo by Roscosmos / NTSOMZ/ SRC "Planeta" / zelenyikot.livejournal.com
http://www.slate.com/blogs/bad_astronomy/2013/09/25/earth_at_equinox_elektro_l_view_of_the_earth_from_space.html
http://commons.wikimedia.org/wiki/File:Portrait_of_Robert_Hooke_with_a_book,_spring_and_quill.JPG
http://en.wikipedia.org/wiki/Isaac_Ne

0h09m

Tides: Crash Course Astronomy #8

Today Phil explores the world of tides! What is the relationship between tides and gravity? How do planets and their moons become tidally locked? What would happen if you were 300km tall? Important questions.

--

Gravity Over Distance 0:44
Tidal Force Parameters 1:35
Battle of the Bulges 2:55
Tidal Lock 6:17

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

PHOTO/VIDEO CREDITS
Photo & video credit: "NASA's Scientific Visualization Studio"
http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=4236 Photo credit: "NASA's Scientific Visualization Studio"
https://www.flickr.com/photos/gsfc/8556665115/in/photostream/
http://svs.gsfc.nasa.gov/cgi-bin/details.

0h10m

Introduction to the Solar System: Crash Course Astronomy #9

In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of gas to the system of planets and other celestial objects we have today.

This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse

--

Makeup of a Solar System 2:38
From Gas to a Disc 5:36
Planet Formation Depends on Distance to Sun 7:14
Motion of a System 8:21

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Subbable: http://subbable.com/crashcourse

--

PHOTO/VIDEO CREDITS
Sun: http://www.nasa.gov/sites/default/files/706436main_20121114-304-193blend_m6-orig_full.jpg [credit: NASA/ESA]
Jupiter: http://www.jpl.nasa.gov/images/hub

0h12m

The Sun: Crash Course Astronomy #10

Phil takes us for a closer (eye safe!) look at the two-octillion ton star that rules our solar system. We look at the sun's core, plasma, magnetic fields, sunspots, solar flares, coronal mass ejections, and what all of that means for our planet.

This episode is sponsored by Squarespace: http://www.squarespace.com/crashcourse

--

The Sun is a Star 1:28
Plasma's Magnetic Fields 6:11
Sunspots, Solar Flares, and Coronal Mass Ejections 7:09
How the Earth Reacts 9:18

--

PBS Digital Studios: http://youtube.com/pbsdigitalstudios

Follow Phil on Twitter: https://twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - http://www.facebook.com/YouTubeCrashCourse
Twitter - http://www.twitter.com/TheCrashCourse
Tumblr - http://thecrashcourse.tumblr.com
Support CrashCourse on Patreon: http://www.patreon.com/crashcourse

--

PHOTO/VIDEO CREDITS
Hubble extrasolar planet search field in Sagittarius: http://www.spacetelescope.org/images/heic0612d/ [credit: NASA, ES

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