does-dark-matter-cause-mass-extinctions-and-geologic-upheavalshttps://www.astronomy.com/tags/news/page/344/News | Page 344 of 718 | Astronomy.comBrowse all the latest astronomy and space news on planets, stars, galaxies, cosmology, observing events, space missions, and more.https://www.astronomy.com/uploads/2021/09/NGC4565.jpgInStockUSD1.001.00cosmologymilky-waysolar-systemarticleASY2023-05-182015-02-2339878