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Galaxies, part 1: Crash Course Astronomy #38

The Milky Way is our neighborhood in the universe. It’s a galaxy and there are many others out there. Galaxies contain gas, dust, and billions of stars or more. They come in four main shapes: elliptical, spiral, peculiar, and irregular. Galaxies can collide, and grow in size by eating each other. Check out the Crash Course Astronomy poster here: http://store.dftba.com/products/crash... -- Chapters: Introduction: Galaxies 00:00 Spiral Galaxies 3:00 Elliptical Galaxies 5:22 Galactic Collisions 6:18 Peculiar Galaxies 8:46 Irregular Galaxies 9:29 Review 11:08 -- PBS Digital Studios:    / pbsdigitalstudios   Follow Phil on Twitter:   / badastronomer   Want to find Crash Course elsewhere on the internet? Facebook -   / youtubecrashcourse   Twitter -   / thecrashcourse   Tumblr -   / thecrashcourse   Support CrashCourse on Patreon:   / crashcourse   -- PHOTOS/VIDEOS NGC 5363 http://aftar.uaa.alaska.edu/gallery/d... [credit: T.A. Rector (University of Alaska Anchorage) and H. Schweiker (WIYN and NOAO/AURA/NSF)] Panorama of Spiral Galaxy, M31 http://www.noao.edu/image_gallery/htm... [credit: Local Group Survey Team and T.A. Rector (University of Alaska Anchorage)] Animation of a variable star http://www.spacetelescope.org/videos/... [credit: NASA, ESA, M. Kornmesser] Hubble M31 PHAT Mosaic http://hubblesite.org/newscenter/arch... [credit: NASA, ESA, J. Dalcanton, B.F. Williams, and L.C. Johnson (University of Washington), the PHAT team, and R. Gendler] Elliptical - Death of giant galaxies spreads from the core https://www.spacetelescope.org/news/h... [credit: ESA/Hubble & NASA] Spiral - HUBBLE VIEW OF BARRED SPIRAL GALAXY MESSIER 83 http://sci.esa.int/hubble/53590-hubbl... [credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA). Credit: William Blair (Johns Hopkins University)] Peculiar - Colliding galaxies make love, not war https://www.spacetelescope.org/news/h... [credit: NASA, ESA, and the Hubble Heritage Team STScI/AURA)-ESA/Hubble Collaboration] Irregular - Little Galaxy Explored http://www.nasa.gov/mission_pages/spi... [credit: NASA/JPL-Caltech/STScI] Hubble Image of Messier 101 http://hubblesite.org/newscenter/arch... [credit: NASA, ESA, K. Kuntz (JHU), F. Bresolin (University of Hawaii), J. Trauger (Jet Propulsion Lab), J. Mould (NOAO), Y.-H. Chu (University of Illinois, Urbana), and STScI] A poster-size image of the beautiful barred spiral galaxy NGC 1300 http://www.spacetelescope.org/images/... [credit: NASA, ESA, and The Hubble Heritage Team STScI/AURA)] NGC 3344 http://skycenter.arizona.edu/gallery/... [credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona] Flocculent spiral NGC 2841 http://www.spacetelescope.org/news/he... [credit: NASA, ESA and the Hubble Heritage Team] Barred Spiral Galaxy NGC1365 https://www.noao.edu/image_gallery/ht... [credit: SSRO/PROMPT and NOAO/AURA/NSF] Magnificent Details in a Dusty Spiral Galaxy http://hubblesite.org/newscenter/arch... [credit: The Hubble Heritage Team] Panning across Messier 77 http://www.spacetelescope.org/videos/... [credit: NASA, ESA, Digitized Sky Survey 2. Acknowledgement: A. van der Hoeven] Hubble Mosaic of the Sombrero Galaxy http://www.spacetelescope.org/images/... [credit: NASA/ESA and The Hubble Heritage Team] Spiral Galaxy NGC 4565 http://www.eso.org/public/images/eso0... [credit: ESO] M87 (with Jet) http://skycenter.arizona.edu/gallery/... [credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona] M59, NGC4621 https://www.noao.edu/image_gallery/ht... [credit: NOAO/AURA/NSF] Fulldome simulation of colliding galaxies http://www.spacetelescope.org/videos/... [credit: NASA/STScI] Antennae Galaxies http://www.spacetelescope.org/images/... [credit: ESA/Hubble & NASA] Terzan 5 Artist’s Concept http://www.sdss3.org/press/images/201... [credit: Amanda Smith, Institute of Astronomy, University of Cambridge] Interacting Galaxy Pair Arp 87 http://hubblesite.org/newscenter/arch... [credit: NASA, ESA, and the Hubble Heritage Team] Doing cartwheels to celebrate the end of an era http://www.spacetelescope.org/images/... [credit: ESA/Hubble & NASA] Hoag's Object http://hubblesite.org/newscenter/arch... [credit: NASA and The Hubble Heritage Team] Paranal Nights https://www.eso.org/public/images/pot... [credit: Y. Beletsky (LCO)/ESO] Tarantula Nebula http://www.eso.org/public/images/eso1... [credit: TRAPPIST/E. Jehin/ESO] Hubble Ultra Deep Field 2014 http://hubblesite.org/newscenter/arch... [credit: NASA, ESA]