Which visual distortion arises when projecting celestial sphere from an astrolabe planispheric projection?

💡 Explanation

When projecting the celestial sphere onto a flat surface, the stereographic projection of astrolabes causes angular deformation since equal angles on sphere are not exactly equal angles on the plane, especially near horizon positions. Therefore angular deformation results, rather than compression, fringing, or stretching effects, which arise from different optical distortions or projection methods.

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