Question

2025 astronomy fall final exam (1st semester)
click the position the celestial sphere that represents the persons zenith.

Explanation:

Step1: Recall Zenith Definition

The zenith is the point on the celestial sphere directly overhead of an observer.

Step2: Analyze Positions

• Position \( a \): Near the northern horizon (labeled N), not overhead.
• Position \( b \): At the top of the celestial hemisphere, directly above the observer (the stick figure).
• Position \( c \): Near the southern horizon (labeled S), not overhead.
• Position \( d \): Along the horizon line (the dashed line), not overhead.

Answer:

b