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Which outcome resulted from thermal expansion, altering historical astronomical measurements using brass astrolabes?

A)Parallax error introduced into readings
B)Ecliptic coordinate system was redefined
C)Celestial sphere model was invalidated
D)Planet visibility calculations remained accurate

💡 Explanation

Thermal expansion caused slight dimensional changes in the brass astrolabes, causing parallax error because the instrument's alignment was no longer precise; therefore positional measurements were affected, rather than calculations or redefining celestial models.

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