What aspect of the observational astronomer’s work demands a high degree of practical physical and engineering expertise?

Answer

Designing photon capture experiments, calibrating instruments, and processing light data

Observational astronomers spend considerable time on data acquisition, which involves designing experiments to capture light, calibrating instruments against atmospheric distortion, and processing that data to extract physical parameters.

What aspect of the observational astronomer’s work demands a high degree of practical physical and engineering expertise?

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