Which mapping transformation causes distortions when projecting the celestial sphere using an astrolabe's stereographic projection?

💡 Explanation

When projecting the celestial sphere onto an astrolabe, stereographic projection causes area compression near the horizon because it preserves angles but not areas. Therefore area compression occurs, rather than angular deformation, distance issues only at poles, or uniform shape distortion as the stereographic projection is conformal and locally preserves shapes away from the projection poles.

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