Which one or more of the following correctly describes our current understanding of our Galaxy’s spiral arms. A. The spiral arms are created by density waves that sweep around the Galaxy B. The spiral

Which one or more of the following correctly describes our current understanding of our Galaxy’s spiral arms. A. The spiral arms are created by density waves that sweep around the Galaxy B. The spiral arms are the sites for the formation of new stars. C. Stars that are formed in a spiral arm remain in that spiral arm.

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Which one or more of the following correctly describes our current understanding of our Galaxy’s spiral arms. A. The spiral arms are created by density waves that sweep around th…

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