Galaxies, part 2: Crash Course Astronomy #39
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Active galaxies pour out lots of energy, due to their central supermassive black holes gobbling down matter. Galaxies tend not to be loners, but instead exist in smaller groups and larger clusters. Our Milky Way is part of the Local Group, and will one day collide with the Andromeda galaxy. Clusters of galaxies also clump together to form superclusters, the largest structures in the Universe. In total, there are hundreds of billions of galaxies in the Universe. Crash Course Astronomy Poster: http://store.dftba.com/products/crashcourse-astronomy-poster -- Table of Contents Black Holes at the Center of Galaxies 2:26 Galaxies Are a Part of Small/Large Clusters 9:47 The Milky Way is Part of the Local Group 6:45 Galaxy Clusters Clump Together to Create Superclusters 11:03 Hundreds of Billions of Galaxies 12:39 -- 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 Galactic Wreckage in Stephan's Quintet http://hubblesite.org/newscenter/archive/releases/2009/25/image/x/ [credit: NASA, ESA, and the Hubble SM4 ERO Team] Best image of bright quasar 3C 273 http://www.spacetelescope.org/images/potw1346a/ [credit: ESA/Hubble & NASA] Nearby Quasar 3C 273 http://hubblesite.org/newscenter/archive/releases/2003/03/image/a/ [credit: NASA, M. Clampin (STScI), H. Ford (JHU), G. Illingworth (UCO/Lick Observatory), J. Krist (STScI), D. Ardila (JHU), D. Golimowski (JHU), the ACS Science Team, J. Bahcall (IAS) and ESA] Gamma Rays http://chandra.harvard.edu/photo/2014/archives/archives_herca.jpg [credit: X-ray: NASA/CXC/SAO, Optical: NASA/STScI, Radio: NSF/NRAO/VLA] Black hole (artist's impression) http://www.spacetelescope.org/videos/hst15_black_hole2/ [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)] Matter accreting around a supermassive black hole (artist's impression) http://www.spacetelescope.org/videos/hubblecast43c/ [credit: ESA/Hubble (M. Kornmesser)] Artist’s animation of galaxy with jets from a supermassive black hole http://www.spacetelescope.org/videos/heic1511a/ [credit: ESA/Hubble, L. Calçada (ESO)] NASA's Swift Finds 'Missing' Active Galaxies https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=10698 [credit: NASA/Goddard Space Flight Center] Sagittarius A*: NASA's Chandra Detects Record-Breaking Outburst from Milky Way's Black Hole http://chandra.harvard.edu/photo/2015/sgra/ [credit: NASA/CXC/Amherst College/D.Haggard et al] NASA Hubble Sees Sparring Antennae Galaxies https://www.nasa.gov/content/goddard/nasa-hubble-sees-sparring-antennae-galaxies [credit: Hubble/European Space Agency] A New Dawn http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11011 [credit: NASA, ESA, G. Besla (Columbia University) and R. van der Marel (STScI)] Galaxy Sky http://svs.gsfc.nasa.gov/vis/a010000/a011000/a011011/hs-2012-20-h-full_1920x1080.jpg [credit: NASA, ESA, Z. Levay and R. van der Marel (STScI) T. Hallas, and A. Mellinger] Virgo Cluster http://deepskycolors.com/astro/2015/06/RBA_VirgoCluster3p_2048.jpg [credit: Rogelio Bernal Andreo] Cosmic Clumps http://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11445 [credit: NASA's Scientific Visualization Studio] Laniakea: Our Home Supercluster of Galaxies http://apod.nasa.gov/apod/ap140910.html [credit: R. Brent Tully (U. Hawaii) et al., SDvision, DP, CEA/Saclay] Webb Science Simulations http://svs.gsfc.nasa.gov/vis/a010000/a010600/a010663/index.html [credit: NASA/Goddard Space Flight Center and the Advanced Visualization Laboratoy at the National Center for Supercomputing Applications] Hubble Deep Field https://upload.wikimedia.org/wikipedia/commons/5/5f/HubbleDeepField.800px.jpg [credit: R. Williams (STScI), the Hubble Deep Field Team and NASA] Hubble Ultra Deep Field 2014 http://hubblesite.org/newscenter/archive/releases/2014/27/image/a/ [credit: NASA, ESA, H. Teplitz and M. Rafelski (IPAC/Caltech), A. Koekemoer (STScI), R. Windhorst (Arizona State University), and Z. Levay (STScI)]
Comments
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How does Hubble space telescope take long exposure when it keeps moving in its orbit ? If it is not stationary, how can it maintain its focus ?
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We Yearn to Learn More 14:17 ,
Carl Segan should sue you over this... -
I would say we could name the galaxy Milky Andromeda , but we wont be alive at that point!!
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I love how passionate he is about his work! This has also changed my view on the universe, I've been thinking more macroscopically lately. Love the series!
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Milkyandro
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Austin Harding here, here's the name i propose, obviously a mix of the 2 but less literal a mix... READY The Milky Drama Galaxy!!! fitting AND self descriptive since it would be quite dramatic a collision
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I was hoping you would focus on quasars more in this series
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So, has anybody else besides me spotted what famous 80's new wave vocalist was sneaked into this video? I'll save you time, he's at 2:40
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milky drama
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I could have sworn I heard the name Milkdromeda years ago. But then again. If anyone is around billions of years from now, they probably won't go looking through youtube comments for name suggestions.
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Phil Plait is DA coolest
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Andromelky-way :P?
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The andyway? I think thats a better name
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The ancient philosopher Marcus Aurelius used to talk about how insignificant we are. He described the world as very small also. I wish he could have been around to witness our advances in knowledge that reveal just how right he was.
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Don't assume Galaxy type.
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Milky Way + Andromeda = Mega Milk or (Megomeda = me-ga-me-du).
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Andray-sounds catchy, short and cool (said like Crash Course's games host's name)
15m 35sLenght
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