ScienceScientists Have Figured Out How Fast The Fastest Star In The Galaxy IsAnd it's going a mere 2.7 million miles per hour.By by Kasia GalazkaBuzzFeed Staff and by Dan MethBuzzFeed StaffPosted on March 17, 2015, 7:12 pmTwitterFacebookLink A speeding star in our galaxy is the fastest recorded star in the Milky Way Galaxy. It's so fast, it'll escape the Milky Way's gravity. So how did it become so fast? Here's a short video that helps visualize the ejection. View this video on YouTube youtube.com Sayonara, gravity! "The fastest unbound star in our Galaxy ejected by a thermonuclear supernova" — Science, March 6, 2015