this post was submitted on 11 Dec 2023
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Did the last great galactic merger create the Milky Way's bar? (phys.org)
submitted 1 year ago by [email protected] to c/space
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The Milky Way is a spiral galaxy. More specifically, it is a barred spiral galaxy, meaning that within its central region, there is a bar shape off of which the spirals emanate. About two-thirds of spiral galaxies are barred spirals, and astronomers have thought this difference is just a variance in how density waves cluster stars in a galaxy. But a new study suggests that the bar of the Milky Way may have been caused by an ancient collision with another galaxy.

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