Father of systematic astronomy as well as mathematical mapping?

• A. Galileo
• B. Hipparchus
• C. Copernicus
• D. Ptolemy

Answer: (B)

The key idea is recognizing who established a methodical, measurement-based approach to mapping the sky. Hipparchus built the first substantial star catalog and developed trigonometry as a practical tool for precise angular measurements. With these advances, he mapped star positions on the celestial sphere and tracked changes over time, giving astronomy a systematic, mathematical footing. This combination of careful observation plus mathematical mapping is what earns him that designation. Galileo later expanded observational astronomy with the telescope but didn’t lay down the systematic, math-driven mapping tradition; Copernicus offered a heliocentric model; Ptolemy organized geometric models and produced influential maps and tables, yet the distinctive pairing of a formal star catalog with trig-based sky mapping belongs to Hipparchus.