How to Kill a Galaxy
Our Milky Way galaxy is alive and well, producing new stars all the time. But there’s another group of galaxies out there, populated only by venerable red dwarf stars - the young stars are nowhere to be seen. In effect, these galaxies are... dead. How did they die? Get 10% off today—WITH FREE WORLDWIDE SHIPPING—by going to http://ridge.com/SCISHOW and use code “SCISHOW” at check out. Hosted by: Caitlin Hofmeister SciShow has a spinoff podcast! It s called SciShow Tangents. Check it out at http://www.scishowtangents.org ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever: Kevin Bealer, Jacob, Katie Marie Magnone, D.A. Noe, Charles Southerland, Eric Jensen, Christopher R Boucher, Alex Hackman, Matt Curls, Adam Brainard, Scott Satovsky Jr, Sam Buck, Ron Kakar, Chris Peters, Kevin Carpentier, Patrick D. Ashmore, Piya Shedden, Sam Lutfi, Charles George, Christoph Schwanke, Greg ---------- 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: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: https://astronomy.com/news/2015/05/cause-of-galactic-death-strangulation https://www.nature.com/articles/nature14439 https://arxiv.org/abs/1505.03143 https://arxiv.org/abs/1407.1078 https://arxiv.org/abs/1601.06080 https://skyandtelescope.org/astronomy-resources/kavli-foundation-how-do-galaxies-die/ https://www.kavlifoundation.org/kavli-news/supermassive-black-hole-wind-can-stop-new-stars-forming#.Xq_Z31NKgWq https://arxiv.org/abs/1605.07626 https://www.space.com/35374-dead-galaxies-killed-by-gas-stripping.html https://astronomy.swin.edu.au/cosmos/R/Ram+Pressure+Stripping https://arxiv.org/abs/1611.00896 https://sci.esa.int/web/hubble/-/45600-ram-pressure-stripping-galaxies-ngc-4522-and-ngc-4402 Image Sources: https://images.nasa.gov/details-PIA10748 http://keckobservatory.org/monster-galaxy/ https://www.flickr.com/photos/gsfc/5239323750 https://commons.wikimedia.org/wiki/File:06-Local_Group_(LofE06250).png http://skyserver.sdss.org/dr16/en/tools/chart/image.aspx?ra=136.10873&dec=41.48379&width=512&height=512&scale=0.4 https://svs.gsfc.nasa.gov/vis/a010000/a010900/a010943/index.html https://commons.wikimedia.org/wiki/File:NGC_4522_Hubble_heic0911b.jpg
