Answer:
Mars is, on average, about 50 million miles (80.5 km) farther from the sun than Earth is. And the farther a planet is from the sun, the longer its year. The lengths of planetary years are governed by precise rules. Johannes Kepler (1571–1630) discovered the relationship between the length of the year and the radius of the orbit that applied to all planets, but it took Isaac Newton (1642–1727) to explain this pattern.
As a planet travels in its almost circular orbit, it's continuously accelerating toward the sun. This is due to the gravitational attraction between the sun and the planet, which is stronger the closer they are to each other. But the stronger the pull of gravity, the greater the planet's acceleration, which results in the planet's revolving at a higher speed. This is a good thing—it's what's necessary to keep the planet in its orbit, falling around the sun instead of plunging into it. So the inner planets are compelled to rush around their orbits, while the outer planets revolve around the sun at a leisurely pace.
Going Further
Scientists involved with the robotic exploration of Mars need to know martian time so they can plan a rover's activities to take place during the martian day. So of course they use a Mars clock. You can download NASA's Mars24 Sunclock to see local martian time for yourself.
Step-by-step explanation: