What detailed observations, like radio observations, help map structures like the Sagittarius Arm?
Answer
Revealing complex structures like breaks or gaps
The massive spiral arms, such as the Sagittarius Arm, are vast regions where star formation is concentrated, and they are mapped using various astronomical techniques. Studies employing radio observations are crucial for discerning the detailed morphology of these arms. Specifically, these sophisticated mapping efforts have sometimes revealed complex characteristics within the Sagittarius Arm, such as the presence of breaks or gaps in the concentration of mass or light, which helps confirm its specific boundaries and internal structure within the galactic disk.
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