**Core Concept**: Vocabulary (verb collocation). **Analysis**: - 'Calculate' (B) implies precise mathematical determination, aligning with scientific methods using instruments. - 'Estimate' (A) suggests approximation without exact data. 'Measure' (C) refers to direct quantification but contradicts 'using advanced telescopes' (indirect method). 'Assess' (D) relates to evaluation, not distance determination. **Key Point**: 'Calculate' matches the context of deriving results through instruments. **Error Alert**: Confusing 'calculate' (process-based) with 'measure' (direct observation).