As I explain in Monday’s post, galaxies collide regularly with one another. These collisions play a significant role in galaxy structure—particularly the formation and maintenance of the spiral arms as well as provide fuel for ongoing star formation. Check out this previous TNRTB post to learn how astronomers observe the outer regions of the Milky Way to find evidence of these abundant collision events.
TNRTB Classic: Colliding Galaxies
December 22, 2011
By Dr. Jeff Zweerink
Subjects: Galaxy Design
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