Uploaded February 2021 | Updated September 2026, 2 weeks ago
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Most galaxies that we know of are spirals, including the Milky Way, but how do they form and keep their shape over billions of years?
Hosted by: Hank Green
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at scishowtangents.org
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Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:
Silas Emrys, Charles Copley, Jb Taishoff, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Christopher R Boucher, Eric Jensen, LehelKovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer
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Sources:
earthsky.org/space/how-do-spiral-galaxies-keep-their-shape
https://astronomy.swin.edu.au/cosmos/S/Spiral+Galaxy+Formation
nasa.gov/feature/how-to-shape-a-spiral-galaxy
http://web.cn.edu/jburton/Astronomy/formationofMilkyWay.htm
scientificamerican.com/article/what-process-creates-and
scientificamerican.com/article/how-did-scientists-determ
arxiv.org/abs/1608.00969
sci-news.com/astronomy/magnetic-fields-spiral-galaxies-07894.html
arxiv.org/abs/1907.06648
eso.org/sci/meetings/2015/Rainbows2015/Talk_Files/DAY3/WeggC.pdf
http://articles.adsabs.harvard.edu/pdf/1964ApJ...140..646L
Images:
hubblesite.org/science/galaxies
esahubble.org/images/heic0910i
svs.gsfc.nasa.gov/13155
beltoforion.de/en/spiral_galaxy_renderer
nasa.gov/feature/how-to-shape-a-spiral-galaxy
esahubble.org/images/heic1202a
esahubble.org/images/heic2002a
simple.wikipedia.org/wiki/File:Morgan-Keenan_spectral_classification.png
esahubble.org/images/heic0910s
esahubble.org/images/opo0501a
esahubble.org/images/potw1801a
esahubble.org/images/heic1107a
This episode is brought to you by EnergySage, the nation’s most trusted online solar marketplace. Head to communitysolar.energysage.com/?rc=cp-scishowspace to see what community solar options are available in your area. With community solar, you can subscribe to a share of a solar farm and immediately start saving on your utility bill. No equipment needed!
Most galaxies that we know of are spirals, including the Milky Way, but how do they form and keep their shape over billions of years?
Hosted by: Hank Green
SciShow has a spinoff podcast! It's called SciShow Tangents. Check it out at scishowtangents.org
----------
Support SciShow by becoming a patron on Patreon: patreon.com/scishow
----------
Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:
Silas Emrys, Charles Copley, Jb Taishoff, Jeffrey Mckishen, James Knight, Christoph Schwanke, Jacob, Matt Curls, Christopher R Boucher, Eric Jensen, LehelKovacs, Adam Brainard, Greg, Ash, Sam Lutfi, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, charles george, Alex Hackman, Chris Peters, Kevin Bealer
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: dftba.com/scishow
----------
Looking for SciShow elsewhere on the internet?
Facebook: facebook.com/scishow
Twitter: twitter.com/scishow
Tumblr: scishow.tumblr.com
Instagram: instagram.com/thescishow
----------
Sources:
earthsky.org/space/how-do-spiral-galaxies-keep-their-shape
https://astronomy.swin.edu.au/cosmos/S/Spiral+Galaxy+Formation
nasa.gov/feature/how-to-shape-a-spiral-galaxy
http://web.cn.edu/jburton/Astronomy/formationofMilkyWay.htm
scientificamerican.com/article/what-process-creates-and
scientificamerican.com/article/how-did-scientists-determ
arxiv.org/abs/1608.00969
sci-news.com/astronomy/magnetic-fields-spiral-galaxies-07894.html
arxiv.org/abs/1907.06648
eso.org/sci/meetings/2015/Rainbows2015/Talk_Files/DAY3/WeggC.pdf
http://articles.adsabs.harvard.edu/pdf/1964ApJ...140..646L
Images:
hubblesite.org/science/galaxies
esahubble.org/images/heic0910i
svs.gsfc.nasa.gov/13155
beltoforion.de/en/spiral_galaxy_renderer
nasa.gov/feature/how-to-shape-a-spiral-galaxy
esahubble.org/images/heic1202a
esahubble.org/images/heic2002a
simple.wikipedia.org/wiki/File:Morgan-Keenan_spectral_classification.png
esahubble.org/images/heic0910s
esahubble.org/images/opo0501a
esahubble.org/images/potw1801a
esahubble.org/images/heic1107a
