what is the special characteristic of the planet Mars

Dear student, Mars has a rotational period of 24 hours and 37 minutes, a period for revolution about the sun of 687 days, and a diameter of 6800 km (about half that of Earth). Its average density is 3.9 g/m^3, which is considerably less than the 5.2-5.5 g/m^3 characteristic of Mercury, Venus, and the Earth. This density gives it a mass about 11% of that for Earth. It is most easily observed from Earth when it is at opposition. Acceleration due to gravity on Mars is 3.8m/s^2,which is much less than earth. Regards