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Explorations an Introduction to Astronomy Thomas T. Arny | ||||||||
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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.
(Top) 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. Subsequently the gas in the disk turns into
Pop I stars.
(Bottom) 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.
