Dark Matter: Crash Course Astronomy #41

Today on Crash Course Astronomy, Phil dives into some very dark matters. The stuff we can actually observe in the universe isn’t all there is. Galaxies and other large structures in the universe are created and shifted by a force we detect mostly indirectly, by observing its impact: DARK MATTER.

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Chapters:
Introduction: Dark Matter 00:00
Discovery of Dark Matter 0:55
What is Dark Matter? 3:50
Axions 4:33
Gravitational Lensing and the Bullet Cluster 5:15
What Effect Does Dark Matter Have on the Universe? 8:50
Review 10:48
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PHOTOS/VIDEOS

[cougarhunter]

If I had teachers like the Crash Course folks, and specifically Phil, life would have turned out very different for me.

[robotaholic]

I love Phil Plaits ability to explain so well. The graphics and illustrations really make this great.

[marmorealcandors]

If there is more dark matter in the universe than normal matter, isn't dark matter the "normal" matter now?

[MillerDvS]

Today I learned that dark matter is the force.

[FriedrichHerschel]

If 85% of the mass of the universe is Dark Matter, I'd say we are "special" for being made of the unusual stuff that makes up the last 15%.

[faitliv]

"It surrounds us and penetrates us..."

I need an adult.

[hali]

This series is full of puns I am *delighted*

[Ayush.S]

Please don't end this series ;___;
I heard that there will be only 46 episodes.

[garethdean]

Dark energy: Cool discovery guys, here's your Nobel.

Dark matter: Cool discovery lady here's ummm.... a gift certificate.

C'mon guys, blue LEDs were nice, but dark matter needs some recognition here.

[MithraRaina]

Whenever I get to see Phil's episode, my love for astronomy is increasing. Such an inspiring series. You guys are doing awesome! Keep going! Waiting for more episodes!

[LetsTakeWalk]

This probably the closest thing we get to a Crash Course Physics.

[stz]

The BEST series in the observable cosmos!

[tiiiimmmmmm]

I just want to thank the crash course team for having this astronomy series. The video uploads corresponded almost perfectly with the topics in my college astronomy class, and I'm using it currently to study for my final. It was a huge help. Thank you!

[MetricZero]

When you end this series I will feel very sad and depressed. Until then though, I'm always super giddy whenever a new episode is released! Keep up the great work.

[danbilokha]

It's just so good, so knowledgable. I wish rest 90% of youtube was the same :)

[mfwhom]

Yaaa!! Know I know that I even more smaller and irrelevant to the universe then previously thought

[lgjmaes]

yo crash course, i know this i kinda cheesy, but i really really want to thank all of you, for giving someone who was to frikn lazy to do anything at school easy acses (acces? well wathever) to the basic of knowledge i crave for so much, in a way i can understand it. lazyness + unfortunate events are the cause of the fact that i'm still a few years behind before i've payed all the debts i had made, or else i would sponsor the sh*t out of you haha! thank again!

[kevingallagher]

Thank you Phil Plait for being such an awesome instructor, and sharing your passion for space with us. I love this course, whether I am dancing to the theme song, taking hand-written notes, or sharing fun facts with family and friends.

[VanDeKapp]

this is hands down my favorite series on YouTube. please don't ever stop making these. Phil, your are awesome mate!!

[yoshiplaysmc]

I was just thinking about CC astronomy when this was just uploaded. That was perfect timing