The Milky Way s Stolen Globular Clusters universetoday.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from universetoday.com Daily Mail and Mail on Sunday newspapers.
Ask astronomers about dark matter and one of the things they talk about is that this invisible, mysterious stuff permeates the universe. In particular, it exists in halos surrounding most galaxies.