The Milky Way: Crash Course Astronomy #37

1,358,645
0
Published 2015-10-22
Today we’re talking about our galactic neighborhood: The Milky Way. It’s a disk galaxy, a collection of dust, gas, and hundreds of billions of stars, with the Sun located about halfway out from the center. The disk has grand spiral patterns, formed by the traffic jams of stars and nebulae, where stars are born. The central region is shaped like a bar and is mostly old, red stars. There’s also a halo surrounding us of old stars.

Check out the Crash Course Astronomy solar system poster here: store.dftba.com/products/crash...

--

Chapters:
Introduction: The Milky Way 00:00
What is the Milky Way Galaxy? 1:15
The Milky Way's Shape 2:18
Spiral Arms of the Milky Way 4:08
Mapping the Milky Way 7:15
Outer Halo of the Milky Way 9:09
Review 10:07
--

PBS Digital Studios: youtube.com/pbsdigitalstudios

Follow Phil on Twitter: twitter.com/badastronomer

Want to find Crash Course elsewhere on the internet?
Facebook - www.facebook.com/YouTubeCrashCourse
Twitter - www.twitter.com/TheCrashCourse
Tumblr - thecrashcourse.tumblr.com/
Support CrashCourse on Patreon: www.patreon.com/crashcourse

--

PHOTOS/VIDEOS
Milky Way, Artist’s Drawing www.nasa.gov/mission_pages/spitzer/multimedia/2008… [credit: NASA/JPL-Caltech]
Joshua Tree deepskycolors.com/astro/2013/04/2013-04_JoshuaTree… [credit: Rogelio Bernal Andreo]
Milky Way Center Region Mosaic sguisard.astrosurf.com/Pagim/GC.html [credit: ESO]
New Hubble image of star cluster Messier 15 www.spacetelescope.org/images/heic1321a/ [credit: NASA, ESA]
Artist’s impression of the Milky Way www.spacetelescope.org/videos/hubblecast70b/ [credit: ESA/Hubble and M. Kornmesser]
M83 (Hubble Only and Hubble-Subaru-ESO Composite) www.robgendlerastropics.com/M83-New-HST.html [credit: Robert Gendler, 8.2 Meter Subaru Telescope (NAOJ), European Southern Observatories, Hubble Legacy Archive]
Hubble's Largest Galaxy Portrait Offers a New High-Definition View hubblesite.org/newscenter/archive/releases/2006/10… [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]
NGC 3344 skycenter.arizona.edu/gallery/Galaxies/NGC3344 [credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona]
Annotated Milky Way www.jpl.nasa.gov/images/wise/20150603/spitzer20150… [credit: NASA/JPL-Caltech]
Black hole with corona, X-ray source (artist's concept) en.wikipedia.org/wiki/Black_hole#/media/File:Black… [credit: NASA/JPL-Caltech]
A Galaxy and its Halo www.esa.int/spaceinimages/Images/2008/06/A_galaxy_… [credit: ESA (image by C. Carreau)]
How to Become a Star www.eso.org/public/images/eso0102a/ [credit: ESO]

All Comments (21)
  • @crayzbotzz700
    So the spiral arms are giant traffic jams? I guess you can call it a: Space Jam
  • @GMAd-yc1vj
    I Have no idea why but I like watching and learning stuff about astronomy
  • What distinguishes these videos is that the guy is not afraid to say "we don't know" something - so you get a bigger picture
  • @DarthTribal
    Half of this goes over my head every episode but I still love it. Plus it gives me an excuse to keep re-watching them. :)
  • @TheDKninja
    I love space and astronomy, but whenever I go outside at night and look up at the stars I sometimes get a deep feeling of anxiety and fear. Especially when I notice the Milky way. Like maybe I might fall into it or it could be the size of it all is overwhelming.
  • @kaleba5203
    Who else watches this series just for fun?
  • @benaaronmusic
    Reminds me of a quote, "I am just a speck of dust inside a giant's eye"
  • @drink15
    I was already strapped in. I can't strap in anymore!
  • @MetaSynec
    0:46 I bet that bar in the middle of the galaxy is called 'The Way Station'!
  • @twelge15
    Now I understand spiral arms as traffic waves with stars traveling through them around the galaxy. Thanks Phil! You explained this better than anyone else has.
  • @nevar108
    I love this series! My 4 year old asks a billion questions after every vid... Awesome!
  • Cramming for my Astronomy final exam. I told my professor, a doctor of astronomy himself, that I was worried about the final, but he said “you listen to Dr. Phil Plait? You’ll be fine.”
  • @DDM-Nerd
    I love this series. It makes me happy and able to better endure the trivial matters that concern many humans.
  • @Umirua
    In Sweden we call it The Winter Road
  • @technofenton
    These should have so many more views. So much information in a short period of time, but at a pace that's easily followed. Not to mention voiced by someone who is knowledgeable in the subject and pleasant to listen to. And that recap is helpful in retaining the most important parts! Love you, Phil!
  • @richardc316
    I love how so many things in space are named after chocolate bars. 😏
  • crash course astronomy has gradually grown on me and it has now become something I look forward to every week! Your enthusiasm for your subject makes it really engaging Phil, keep it up!
  • For a second, I thought that you were going to say that the wave was caused by a disturbance in the Force. Too much Star Wars recently. :p