Hydrogen beast is closing in on the Milky Way

sciencenow.sciencemag.org — It's large, it's fast, and it's heading toward the Milky Way. Less than 40 million years from now, a giant cloud of hydrogen gas, clocked at 250 kilometers per second, will smash into our home galaxy, likely setting off a huge burst of star formation. Jan 12, 2008 View in Crawl 4