Which two structures are identified as the major spiral arms of the Milky Way?
Answer
Scutum-Centaurus and Perseus arms
The Milky Way is organized into several distinct arm structures, but the Scutum-Centaurus and Perseus arms are classified as the major arms. These features are significant because they contain the highest concentrations of young stars and molecular gas. They extend from the central, dense, elongated region of stars known as the galactic bar and serve as primary components of the galaxy's overall gravitational and structural framework.
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