Galaxies’ missing mass may hide in gas clouds
Huge amounts of cold matter surround star-containing regions, study finds
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/01/gp_126032main_spitzer.jpg?fit=860%2C460&ssl=1)
HIDDEN GAS Galaxies like Messier 81, a spiral galaxy in the constellation Ursa Major, are surrounded by vast quantities of cold, nonluminous gas, a new study finds.
JPL-Caltech/NASA and S. Willner/Harvard-Smithsonian CfA