Planet Mars Mars is the fourth planet in increasing order of distance from the Sun and the second in increasing order of size and mass. Its distance from the Sun is between 1.381 and 1.666 AU (206.6 to 249.2 million kilometers), with an orbital period of 669.58 Martian days (686.71 days or 1.88 Earth years). … Continue reading Mars | Planet’s characteristics, distance to Earth, color, composition, peculiarity