What observational advantage does being in the relatively sparser Orion Spur offer compared to being deep within the Sagittarius Arm?
Answer
A slightly clearer vantage point
Being in the sparser Orion Spur provides a vantage point that is clearer than if we were deeply embedded within a massive arm where the view would be dominated and obscured by dense stellar concentrations.
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What Is The Orion Arm Of The Milky Way? - Physics Frontier - YouTube
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