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The surface of Mars contains many unique features, including prominent shield volcanoes, large canyons and caves, pronounced depressions from wind and water erosion and polar caps. In addition to having these features, M... More »

www.reference.com Science Astronomy

The surface gravity of Mars is 3.71 meters per second squared. Because Earth's gravity is 9.8 meters per second squared, Mars' gravity is approximately 38 percent less than the Earth's. Mars' mass is also less than Earth... More »

www.reference.com Science Astronomy Planets

Many photos have been taken of the surface of Mars. The first successful mission to take photographs of the Martian surface was the Mariner 4, a project launched in 1964 by the United States that sent back 21 images of t... More »

www.reference.com Science Astronomy Planets
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Mars and Earth both rotate around the sun, but at different speeds. Their location relative to each other is constantly changing, as demonstrated by simulations presented by Windows to the Universe. In order to determine... More »

www.reference.com Science Astronomy

Mars is a terrestrial planet, which means it is made up largely of rock. Elements that make up the rock include silicon and different types of metal. More »

www.reference.com Science Astronomy

Mars in Gemini is an astrological marker which signifies that the planet Mars was located in the constellation of Gemini at the time of birth. In astrology, Mars is said to reveal a person's basic animal nature including... More »

www.reference.com Science Astronomy

Weathering creates underground caves and passages in limestone in addition to depressions and other unusual dips and grooves on the surface. Karst is landscape formed from the weathering of limestone. More »

www.reference.com Science Earth Science Erosion & Weathering