for some definition of "galaxy" - sort of https://news.nationalgeographic.com/news/2012/03/120306-dark-matter-galaxies-mystery-space-science/ https://news.natio

for some definition of "galaxy" - sort of https://news.nationalgeographic.com/news/2012/03/120306-dark-matter-galaxies-mystery-space-science/ https://news.nationalgeographic.com/news/2012/03/120306-dark...