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Mars is approximately half the diameter of Earth, with a surface area only slightly less than the total area of Earth's dry land. [ 2 ] Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about 38% of Earth's surface gravity.
With a radius of 2,106 miles (3,390 kilometers), Mars is about half the size of Earth. If Earth were the size of a nickel, Mars would be about as big as a raspberry. From an average distance of 142 million miles (228 million kilometers), Mars is 1.5 astronomical units away from the Sun.
At its equator, Mars has a diameter of 4,222 miles (6,794 km), but from pole to pole, the diameter is 4,196 miles (6,752 km). Mars’ radius is, of course, half of planet’s diameter.
Mars is the fourth planet in the solar system in order of distance from the Sun and the seventh in size and mass. It is a periodically conspicuous reddish object in the night sky. There are intriguing clues that billions of years ago Mars was even more Earth-like than today.
Size: Mars is about 4,212 miles (6,779 kilometers) in diameter. Distance from the Sun: Mars is the fourth planet from the Sun and orbits roughly 142 million miles (229 million km) away.
With a radius of 2,106 miles (3,390 kilometers), Mars is about half the size of Earth. If Earth were the size of a nickel, Mars would be about as big as a raspberry. From an average distance of 142 million miles (228 million kilometers), Mars is 1.5 astronomical units away from the Sun.
Surface pressure: 6.36 mb at mean radius (variable from 4.0 to 8.7 mb depending on season) [6.9 mb to 9 mb (Viking 1 Lander site)] Surface density: ~0.020 kg/m 3 Scale height: 11.1 km Total mass of atmosphere: ~2.5 x 10 16 kg Average temperature: ~210 K (-63 C) Diurnal temperature range: 184 K to 242 K (-89 to -31 C) (Viking 1 Lander site) Wind ...
The diameter of Mars is 6,792 km. That makes the Red Planet about 53% of the diameter of Earth. In addition to a smaller diameter, Mars has only 10% of Earth’s mass.
Mars has a diameter of 6,792 km (4,220 miles); the planet’s circumference around the equator is 21,326 km (13,300 miles). Thus, if you’re moving at a speed of about 100 km per hour (62 miles per hour), it will take you about nine days to travel around the planet's equator.
Average diameter 4,212 miles (6,780 kilometers); about half the size of Earth, but twice the size of Earth's Moon. Same land area as Earth, reminiscent of a cold, rocky desert. Mass 1/10th of Earth's; gravity only 38 percent as strong as Earth's.