The stars live in dense clumps of gas called giant molecular clouds. (sciencedaily.com)
In addition, dense clumps with many times the dust density elsewhere in the disk also form during the simulation. (sciencedaily.com)
Because galaxies spring from dense clumps of both types of matter, researchers assumed that on average, the makeup of galaxies should exhibit a similar 1 to 6 ratio. (discovermagazine.com)