Dark Matter: Crash Course Astronomy #41
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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. Crash Course Astronomy Poster: http://store.dftba.com/products/crashcourse-astronomy-poster -- Table of Contents Normal and Dark Matter 0:55 Dark Matter Only Interacts With Normal Matter Through Gravity 4:27 Dark Matter Bends Light 5:08 -- 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 -- PHOTOS/VIDEOS Virtual tour in our Solar System (Artist's impression) http://www.spacetelescope.org/videos/hubblecast27b/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)] Hubblecast 11: A grand design in a galactic festoon http://www.spacetelescope.org/videos/heic0719a/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)] Hubble's High-Definition Panoramic View of the Andromeda Galaxy http://hubblesite.org/newscenter/archive/releases/2015/02/image/a/ [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 http://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 http://www.nasa.gov/mission_pages/planck/multimedia/pia15227.html#.ViZwA36rSUl [credit: ESA/Planck Collaboration] How to Become a Star http://www.eso.org/public/images/eso0102a/ [credit: ESO] Neutron star illustrated https://commons.wikimedia.org/wiki/File:Neutron_star_illustrated.jpg [credit: NASA, Casey Reed - Penn State University] Alone in Space - Astronomers Find New Kind of Planet http://www.nasa.gov/topics/universe/features/pia14093.html [credit: NASA/JPL-Caltech] Black hole deforms space http://www.spacetelescope.org/videos/hst15_blackhole_grid/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)] Gravitational lensing in action http://www.spacetelescope.org/videos/heic1106a/ [credit: NASA, ESA & L. Calçada] Bullet Cluster http://apod.nasa.gov/apod/image/0608/bulletcluster_comp_f2048.jpg [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 http://chandra.harvard.edu/photo/2008/bullet/bullet_optical.jpg [credit: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.] Bullet Cluster, X-ray http://chandra.harvard.edu/photo/2008/bullet/bullet_xray.jpg [credit: NASA/CXC/CfA/ M.Markevitch et al.] The Bullet Cluster http://www.esa.int/spaceinimages/Images/2007/07/The_Bullet_Cluster2 [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 http://www.nasa.gov/mission_pages/hubble/science/pandora-cluster.html [credit: NASA] Hubble Refines Distance to Pleiades Star Cluster http://hubblesite.org/newscenter/archive/releases/2004/20/image/a/ [credit: NASA, ESA and AURA/Caltech] Stephan’s Quintet http://apod.nasa.gov/apod/ap120225.html [credit: Hubble Legacy Archive, ESA, NASA] Virgo Cluster Galaxies http://apod.nasa.gov/apod/ap150804.html [credit: Rogelio Bernal Andreo] Illustration of the distribution dark matter in the Universe http://www.nasa.gov/mission_pages/hubble/science/hst_img_20080520.html [credit: NASA, ESA, and E. Hallman (University of Colorado, Boulder)]
Comments
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darkmatter is my psn name
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I like it how he describes, he makes it easier for us to understand.
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my theory dark matter is hero atom getting rekt by villains and coming back and killing em. In short matter and anti matter clashing into each other
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everytime we discover something we feel ourself smaller
its not always true we discovered atoms it made us big then nucleus even more bigger then quantum particles A WHOLE TON A LOT BIGGER! -
Mind blowing
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How concentrated can dark matter get? Can it affect less massive structures, like star clusters and solar systems? Can a planet orbit a dense group of dark matter?
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After watching this I propose we rename Dark Matter, The Force.
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Thanks, I'm giving a presentation on dark matter and this really helped!
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my fav thing ever! DARK MATTERS
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This series is full of puns I am delighted
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I love Phil Plaits ability to explain so well. The graphics and illustrations really make this great.
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What did the astronomer say to his misbehaving son after getting a phone call from his son's teacher? "Son, we must talk about dark matters."
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cause honey what you see... isn't always the truth
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I started studying for a Physics test and now I'm here and its 130 in the morning, help please.
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Oh I found gravitational lensing.
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we must be taught the ways of the dark matter
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Thank you very much, Phil Plait, Nichole Jenkins and Nicole Sweeny and, of course, the others at Crash Course Astronomy! Wow, this dark matter stuff is really fascinating (just like everything else in astronomy)! Surrounding us, penetrating us and making up the majority of things there are in the Universe. I was actually quite surprised to learn that we measure the mass of dark matter by how much it bends light, you know, because dark matter is invisible. I would have though that they’d measure its mass by its gravitational influence on normal matter. After all, light does not bend as much, as easily, as normal matter does, just like you said in this episode. So, why don’t we measure its mass that way instead?
So we think dark matter is made of particles called axions, but we don’t know for sure. What else could dark matter be made of? Which particles?
By the way, I always confuse antimatter and dark matter. What’s the difference now again? Unlike dark matter, antimatter can interact with normal matter and when they do interact, a lot of energy is formed, right? -
Why CrashCourse Kids have Less Viewers?!!
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this makes me crazy. why are we so sure we understand the physics of a galaxy when we have never left our solar system and we cant make the physics of very small and very large work together. the overwhelming amounts of arrogance in "dark matter" frustrates me to no end.
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Does dark matter interact with black holes.? Can it be swallowed by a black hole and increase its size?
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