Why does the Andromeda Galaxy (M31) appear as a complete spiral shape in images?
Answer
It is viewed from an external vantage point.
The Andromeda Galaxy (M31) appears sharp and complete in images because it is an external galaxy, situated approximately 2.5 million light-years away from the Milky Way. This external position allows telescopes to capture its entire shape simultaneously using visible light, as there are no foreground obscuring elements within our own galaxy blocking the view. This external vantage point contrasts sharply with the observational challenge faced when studying our home galaxy, where being situated internally prevents any single, unified external perspective.
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