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Which outcome occurs when an astrolabe's mater warps due to temperature variation, impacting angular measurement?

A)Elongation of the alidade arm
B)Change in star altitude readings
C)Increased parallax error in sightings
D)Shift in compass rose orientation

💡 Explanation

When the mater warps, thermal expansion introduces errors because the projections defining altitude lose accuracy, skewing angular measurements related to celestial height. Therefore, star altitude reading will be inaccurate, rather than alidade elongation, parallax increase, or compass shift which require distinct mechanical failures.

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