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 in it, 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.
Crash Course Astronomy Poster: http://store.dftba.com/products/crashcourse-astronomy-poster
Table of Contents
Milky Way Is A Disc 2:54
Grand Spiral Patterns 4:21
The Central Region Is Bar Shaped 7:48
Outer Halo Of Old Stars 9:09
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
Milky Way, Artist’s Drawing http://www.nasa.gov/mission_pages/spitzer/multimedia/20080603a.html [credit: NASA/JPL-Caltech]
Joshua Tree http://deepskycolors.com/astro/2013/04/2013-04_JoshuaTree_MW.jpg [credit: Rogelio Bernal Andreo]
Milky Way Center Region Mosaic http://sguisard.astrosurf.com/Pagim/GC.html [credit: ESO]
New Hubble image of star cluster Messier 15 http://www.spacetelescope.org/images/heic1321a/ [credit: NASA, ESA]
Artist’s impression of the Milky Way http://www.spacetelescope.org/videos/hubblecast70b/ [credit: ESA/Hubble and M. Kornmesser]
M83 (Hubble Only and Hubble-Subaru-ESO Composite) http://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 http://hubblesite.org/newscenter/archive/releases/2006/10/image/a/ [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 http://skycenter.arizona.edu/gallery/Galaxies/NGC3344 [credit: Adam Block/Mount Lemmon SkyCenter/University of Arizona]
Annotated Milky Way http://www.jpl.nasa.gov/images/wise/20150603/spitzer20150603.jpg [credit: NASA/JPL-Caltech]
Black hole with corona, X-ray source (artist’s concept) https://en.wikipedia.org/wiki/Black_hole#/media/File:Black_Holes_-_Monsters_in_Space.jpg [credit: NASA/JPL-Caltech]
A Galaxy and its Halo http://www.esa.int/spaceinimages/Images/2008/06/A_galaxy_and_its_halo [credit: ESA (image by C. Carreau)]
How to Become a Star http://www.eso.org/public/images/eso0102a/ [credit: ESO]
This series is awesome!
galaxies are black holes huge black holes having stuff spinning around them (ate white chocolate) hoo dini
Since Galaxy translates to 'milky' would it be ok to refer to Galactus as 'The Milk Man?'
hey I'm studying the milky way now, so my teacher told me the middle was a black hole so I that true or not b/c I am very confused.
A french please french subtiles please
This is a great story… but not possible on a flat earth.
Wait a second here. I thought that one of the things Phil said is actually incorrect. He said that the inside parts of the spiral arms would rotate faster than those further out. In a gravitational sense, this makes sense – just look at our solar system. But observations of other galaxies shows that this isn't so – contrary to expectations, stars in the spiral arms rotate at the same speed regardless of distance, giving birth the the whole dark matter idea. Galaxies are embedded in a halo of dark matter that causes the arms to maintain their structure – not the traffic jam idea that Phil sets forth.
Why is every episode of crash course astronomy mind blowing?
What could those 33 people possibly have not liked about this video?
I friggin' love this entire series. The best thing Crash Course has done, I say.
"Mapping the galaxy's spiral arms is ongoing work and it's kinda…" I really thought that sentence was going to end with "boring" and an anecdote about how you did it for a summer job.
So why isn't it Dr. Phil Plait in the credits ?
I cant believe we named our galaxy the milky way, we need to have a cooler name.
We need to change it to asgard.
Umm how do we take pictures if our Galaxy?
Thank you Phil for this series this is awesome
I think this must be at least the second time in this brand new and excellent series where a recent discovery has shown how difficult it is to keep up with developments; what we thought was a region dominated by older stars as Phil describes, has some surprises.
> A group of young stars has been caught loitering near the center of the Milky Way galaxy, a region previously thought to be dominated by a more mature population. Astronomers say the stars form a disk (previously unknown to scientists) that passes through the outer part of the dusty, peanut-shaped bulge at the galactic center.
6:02 Disturbance in the disk? Or a Disturbance in the force….. Of course disturbance in the force just sounds cooler.