Cool halo gas caught spinning like galactic disks

A group of astronomers from University of California, Santa Barbara has discovered cool halo gas spinning in the same direction as galactic disks in typical star-forming galaxies.The researchers used W. M. Keck Observatory to obtain the first-ever direct observational evidence showing that corotating halo gas is not only possible, but common. Their findings suggest that the whirling gas halo will eventually spiral in towards the galactic disk where it can fuel star formation.
Go to Source