How to Kill a Galaxy Unlisted

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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?

Hosted by: Caitlin Hofmeister

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Sources:
https://astronomy.com/news/201....5/05/cause-of-galact
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/as....tronomy-resources/ka
https://www.kavlifoundation.or....g/kavli-news/superma
https://arxiv.org/abs/1605.07626
https://www.space.com/35374-de....ad-galaxies-killed-b
https://astronomy.swin.edu.au/....cosmos/R/Ram+Pressur
https://arxiv.org/abs/1611.00896
https://sci.esa.int/web/hubble..../-/45600-ram-pressur

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_G
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/a010
https://commons.wikimedia.org/....wiki/File:NGC_4522_H