According to Kepler's Second Law of planetary motion, a planet moves fastest in its orbit when it is
A) undergoing retrograde motion
B) in between perihelion and aphelion
C) at perihelion
D) at aphelion

Question

Quizplus · Accepted Answer

Kepler's Second Law states that a planet moves fastest in its orbit when it is closest to the Sun (at perihelion). At this point, the planet experiences the greatest gravitational pull from the Sun, which accelerates its speed. As the planet moves further away from the Sun (towards aphelion), it experiences weaker gravitational force, and its speed reduces.

According to Kepler's Second Law of Planetary Motion, a Planet