For a first-quarter Moon, approximately what is the angle eastward from the Sun to the Moon
A)30°
B)90°
C)180°
D)360°
E)0°

Question

Quizplus · Accepted Answer

During first-quarter Moon, the Moon is located 90° eastward from the Sun as seen from the Earth. This means that the angle between the Sun, Earth, and Moon is approximately 90°, with the Earth being at the vertex of the angle. This configuration results in half of the Moon's visible face being illuminated by sunlight, creating the first-quarter phase.

For a First-Quarter Moon, Approximately What Is the Angle Eastward