Dark Matter: Crash Course Astronomy #41

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Published 2015-12-03
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.

Check out the Crash Course Astronomy solar system poster here: store.dftba.com/products/crash...
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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
Virtual tour in our Solar System (Artist's impression) www.spacetelescope.org/videos/hubblecast27b/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)]
Hubblecast 11: A grand design in a galactic festoon www.spacetelescope.org/videos/heic0719a/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)]
Hubble's High-Definition Panoramic View of the Andromeda Galaxy hubblesite.org/newscenter/archive/releases/2015/02… [credit: NASA, ESA, J. Dalcanton, B.F. Williams, and L.C. Johnson (University of Washington), the PHAT team, and R. Gendler]
Panning and zooming on Abell 1689 www.spacetelescope.org/videos/heic0805b/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)]
All-sky image of molecular gas and three molecular cloud complexes seen by Planck www.nasa.gov/mission_pages/planck/multimedia/pia15… [credit: ESA/Planck Collaboration]
How to Become a Star www.eso.org/public/images/eso0102a/ [credit: ESO]
Neutron star illustrated commons.wikimedia.org/wiki/File:Neutron_star_illus… [credit: NASA, Casey Reed - Penn State University]
Alone in Space - Astronomers Find New Kind of Planet www.nasa.gov/topics/universe/features/pia14093.htm… [credit: NASA/JPL-Caltech]
Black hole deforms space www.spacetelescope.org/videos/hst15_blackhole_grid… [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)]
Gravitational lensing in action www.spacetelescope.org/videos/heic1106a/ [credit: NASA, ESA & L. Calçada]
Bullet Cluster apod.nasa.gov/apod/image/0608/bulletcluster_comp_f… [credit: X-ray: NASA/CXC/CfA/ M.Markevitch et al.; Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/ D.Clowe et al. Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.]
Bullet Cluster, Optical chandra.harvard.edu/photo/2008/bullet/bullet_optic… [credit: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.]
Bullet Cluster, X-ray chandra.harvard.edu/photo/2008/bullet/bullet_xray.… [credit: NASA/CXC/CfA/ M.Markevitch et al.]
The Bullet Cluster www.esa.int/spaceinimages/Images/2007/07/The_Bulle… [credit: X-ray: NASA/CXC/CfA/M.Markevitch, Optical and lensing map: NASA/STScI, Magellan/U.Arizona/D.Clowe, Lensing map: ESO WFI]
Pandora’s Cluster — Clash of the Titans www.nasa.gov/mission_pages/hubble/science/pandora-… [credit: NASA]
Hubble Refines Distance to Pleiades Star Cluster hubblesite.org/newscenter/archive/releases/2004/20… [credit: NASA, ESA and AURA/Caltech]
Stephan’s Quintet apod.nasa.gov/apod/ap120225.html [credit: Hubble Legacy Archive, ESA, NASA]
Virgo Cluster Galaxies apod.nasa.gov/apod/ap150804.html [credit: Rogelio Bernal Andreo]
Illustration of the distribution dark matter in the Universe www.nasa.gov/mission_pages/hubble/science/hst_img_… [credit: NASA, ESA, and E. Hallman (University of Colorado, Boulder)]

All Comments (21)
  • @cougarhunter33
    If I had teachers like the Crash Course folks, and specifically Phil, life would have turned out very different for me.
  • @MillerDvS
    Today I learned that dark matter is the force.
  • If there is more dark matter in the universe than normal matter, isn't dark matter the "normal" matter now?
  • @robotaholic
    I love Phil Plaits ability to explain so well. The graphics and illustrations really make this great.
  • 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%.
  • @LetsTakeWalk
    This probably the closest thing we get to a Crash Course Physics.
  • @fai1t0liv3
    "It surrounds us and penetrates us..." I need an adult.
  • @Ayush.S3
    Please don't end this series ;___; I heard that there will be only 46 episodes.
  • @hali7560
    This series is full of puns I am delighted
  • @garethdean6382
    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!
  • @stz03
    The BEST series in the observable cosmos!
  • @mfwhom5214
    Yaaa!! Know I know that I even more smaller and irrelevant to the universe then previously thought
  • @Quester91
    A shame I can't hit the like button more than once
  • @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!
  • @whatamarvel3636
    After watching this I propose we rename Dark Matter, The Force.
  • @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!
  • @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.