Mars, more than any other planet, has captured our imagination. One reason is the possibility of life on the Red Planet, now or sometime in its past. Mars is the fourth planet from the sun; it is also the next planet that will most likely be inhabited by human beings, within the next century. Mars is named after the Roman god of war. His shield and his spear form the planet's symbol (left). Mars is the planet in our solar system with the most geological extremes. Nearly all of its water is locked up in the polar ice caps, or underground. In fact, an Ice Age seems to grip Mars at the moment. A single Martian day is about 24.6 Earth hours. A Martian year is 686.98 Earth days. Its gravity is only a third of Earth's, and the atmospheric pressure is 1% of Earth's. It has two moons Phobos and Deimos, both small and cratered. Use the menu above to navigate around this site, and to learn about Mars.

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Acknowledgements and Works Cited

Authors: Scott Green, Ben Gross, and Dan Helmer