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Interactive video lesson plan for: Galaxies, part 2: Crash Course Astronomy #39

Activity overview:

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:


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


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Galactic Wreckage in Stephan's Quintet [credit: NASA, ESA, and the Hubble SM4 ERO Team]
Best image of bright quasar 3C 273 [credit: ESA/Hubble & NASA]
Nearby Quasar 3C 273 [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 [credit: X-ray: NASA/CXC/SAO, Optical: NASA/STScI, Radio: NSF/NRAO/VLA]
Black hole (artist's impression) [credit: ESA/Hubble (M. Kornmesser & L. L. Christensen)]
Matter accreting around a supermassive black hole (artist's impression) [credit: ESA/Hubble (M. Kornmesser)]
Artist’s animation of galaxy with jets from a supermassive black hole [credit: ESA/Hubble, L. Calçada (ESO)]
NASA's Swift Finds 'Missing' Active Galaxies [credit: NASA/Goddard Space Flight Center]
Sagittarius A*: NASA's Chandra Detects Record-Breaking Outburst from Milky Way's Black Hole [credit: NASA/CXC/Amherst College/D.Haggard et al]
NASA Hubble Sees Sparring Antennae Galaxies [credit: Hubble/European Space Agency]
A New Dawn [credit: NASA, ESA, G. Besla (Columbia University) and R. van der Marel (STScI)]
Galaxy Sky [credit: NASA, ESA, Z. Levay and R. van der Marel (STScI) T. Hallas, and A. Mellinger]
Virgo Cluster [credit: Rogelio Bernal Andreo]
Cosmic Clumps [credit: NASA's Scientific Visualization Studio]
Laniakea: Our Home Supercluster of Galaxies [credit: R. Brent Tully (U. Hawaii) et al., SDvision, DP, CEA/Saclay]
Webb Science Simulations [credit: NASA/Goddard Space Flight Center and the Advanced Visualization Laboratoy at the National Center for Supercomputing Applications]
Hubble Deep Field [credit: R. Williams (STScI), the Hubble Deep Field Team and NASA]
Hubble Ultra Deep Field 2014 [credit: NASA, ESA, H. Teplitz and M. Rafelski (IPAC/Caltech), A. Koekemoer (STScI), R. Windhorst (Arizona State University), and Z. Levay (STScI)]

Tagged under: John Green,Hank Green,vlogbrothers,Crash Course,crashcourse

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