An observer measures the angle made by stars as they rise and set. As the observer moves northward from the South Pole, this angle
A) remains the same.
B) decreases from 90 to zero.
C) decreases from zero to 90
D) increases from zero to 90 at the equator and then decreases.

Question

Quizplus · Accepted Answer

As the observer moves northward from the South Pole, the angle made by stars as they rise and set increases from zero (at the South Pole, stars appear to move horizontally) to 90 degrees at the equator (where stars rise perpendicularly from the horizon), and then decreases as the observer moves further north from the equator towards the North Pole.

An Observer Measures the Angle Made by Stars as They