The time period between two successive passages of a planet through the position of opposition is
A) 1 year.
B) its sidereal period.
C) its synodic period.
D) its precessional period.

Question

Quizplus · Accepted Answer

The synodic period is the time it takes for a planet to return to the same position in the sky relative to the Earth and the Sun, such as from one opposition to the next. This differs from the sidereal period, which is the time it takes for a planet to complete one orbit around the Sun relative to the fixed stars.

The Time Period Between Two Successive Passages of a Planet