Comparing: Mars
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Wikipedia
Mars
Mars is the fourth planet from the Sun. It is also known as the "Red Planet", for its orange-red appearance. Mars is a desert-like rocky planet with a tenuous atmosphere that is primarily carbon dioxide. At the average surface level the atmospheric pressure is a few thousandths of Earth's, atmospheric temperature ranges from −153 to 20 °C, and cosmic radiation is high. Mars retains some water, in the ground as well as thinly in the atmosphere, forming cirrus clouds, fog, frost, larger polar regions of permafrost and ice caps, but no bodies of liquid surface water. Its surface gravity is roughly a third of Earth's or double that of the Moon. Its diameter, 6,779 km (4,212 mi), is about half the Earth's, or twice the Moon's, and its surface area is the size of all the dry land of Earth.
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Grokipedia
Mars
Mars is the fourth planet from the Sun, a terrestrial world renowned as the Red Planet due to the iron oxide (rust) that gives its surface a distinctive reddish hue. Approximately half the size of Earth , with a radius of 2,106 miles (3,390 kilometers), Mars orbits at an average distance of 142 million miles (228 million kilometers), or 1.5 astronomical units from the Sun. It features a thin atmosphere dominated by carbon dioxide (about 95%), along with traces of nitrogen and argon , which creates a hazy red sky and supports average surface temperatures ranging from 70°F (21°C) at the equator during summer to as low as -243°F (-153°C) at the poles. The planet exhibits dynamic geology, including the massive Olympus Mons , the solar system's tallest volcano at nearly three times the height of Mount Everest , and the vast Valles Marineris canyon system, stretching over 2,500 miles (4,000 kilometers). Evidence from orbital and rover missions suggests Mars once had liquid water across its surface, leaving remnants in polar ice caps and subsurface ice.
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