The point along a planet's orbit where it is closest to the Sun is called the orbit's
A) perihelion
B) aphelion
C) eccentricity
D) semi-major axis
E) period

Question

Quizplus · Accepted Answer

Perihelion refers to the point in an orbit where the planet is closest to the Sun. This is in contrast to aphelion, which refers to the point in an orbit where the planet is farthest from the Sun. Eccentricity refers to how flattened an orbit is, while semi-major axis refers to the size of the orbit. Period refers to how long it takes for a planet to complete one orbit.

The Point Along a Planet's Orbit Where It Is Closest