Kepler's Third Law of Planetary MotionT2 / R3 = constant
means that the period increases as the radius increases. For the Earth, the period is exactly one Earth year! Planets with orbital radii greater than Earth's will have periods that are also greater than Earth's. Mars, Jupiter, and Saturn have periods greater than one Earth year. Planets with orbital radii smaller than Earth's will have periods that are also smaller than Earth's. Mercury and Venus have periods smaller than one Earth year.