Which alternative naming convention sometimes links the Sagittarius Arm?
Answer
Carina–Sagittarius Arm
The naming convention associated with this major spiral feature is sometimes expanded to include another nearby active region of the galaxy. It is frequently referred to as the Carina–Sagittarius Arm. This dual naming links the Sagittarius Arm conceptually with the Carina region, which is also recognized as an active area characterized by significant star formation. This interconnected terminology emphasizes the shared processes and rich interstellar material present across these linked segments of the spiral structure.

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What Is The Sagittarius Arm Of The Milky Way? - Physics Frontier
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