Arny Instructor Resources Chapter Images Chapter 16, Figure 11 Figure 16.11 Sketch illustrating how random motions may affect the type of galaxy formed when a gas cloud collapses. Small random motions may lead to a spiral galaxy. The gas falls smoothly inward and collects in a disk. Rotation of the disk keeps the gas from all falling into the galaxy's core. Large random motions may lead to E type galaxies because denser 'blobs' in the gas 'bounce' off one another and prevent the galaxy from flattening.
Stars form throughout the collapsing volume.
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