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Learn about Mars, the fourth planet from the Sun, and its history, climate, moons, and exploration. Find out how Mars got its name, why it's red, and what makes it a potential habitat for life.
- Overview
Mars is the fourth planet from the Sun – a dusty, cold,...
- In Depth
Mars is one of the easiest planets to spot in the night sky...
- All About Mars
Several missions have orbited, landed on, or roved around on...
- Overview
Learn about Mars, the fourth planet from the Sun, and its history, climate, and moons. Explore the robotic missions and human plans to study and visit the Red Planet.
Mars is the fourth planet from the Sun. The surface of Mars is orange-red because it is covered in iron(III) oxide dust, giving it the nickname "the Red Planet". Mars is among the brightest objects in Earth's sky, and its high-contrast albedo features have made it a common subject for telescope viewing.
Learn about Mars, the fourth planet from the Sun and the second smallest in the solar system. Discover its features, moons, seasons, volcanoes, dust storms, and more.