Size: About one-half the size of Earth in diameterSurface: Canyons, dunes, volcanoes, and polar caps of water ice and carbon dioxide iceDiameter: 4,194 miles (6,794 km)Atmosphere: carbon dioxide (95%) Temperature: as low as –305°F (–187°C)Rotation of its axis: 24 Earth hours, 37 minutes, 23 seconds Rotation around the Sun: 687 Earth daysYour weight: If you weigh 100 pounds on Earth, you would weigh 38 pounds on Mars.Distance from Earth: 35 million miles (56 million km) at the closest point in its orbitMean Distance from Sun:141.71 million miles (227.9 million km)Satellites: 2Rings: 0
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