Mars completes one orbit around the Sun in approximately two Earth years. Mars' average distance to the Sun is about 1.5 AU. Therefore the Mars' orbital speed is lower than Earth's orbital speed.

Question

Quizplus · Accepted Answer

Mars' orbital speed is lower than Earth's because it is farther from the Sun, resulting in a longer orbital path and slower speed according to Kepler's laws of planetary motion.

Mars Completes One Orbit Around the Sun in Approximately Two