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This article "Mars" is from Wikipedia. The list of its authors can be seen in its historical. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.

Mars, shown with its two moons, Phobos and Deimos.

Mars is the fourth planet from the Sun, orbiting it at a distance of 228 million kilometers. It is sometimes called the 'Red Planet' because of its red soil. The soil on Mars is red because it contains iron oxide (rust). It has two moons, called Phobos and Deimos. Phobos is 22 kilometers in diameter while Deimos is 5.23 kilometers wide.

Mythology[edit | edit source]

Mars was named after the Roman god of war. In eastern Asian cultures, Mars was referred to as the "fire star" (火星), due to its red coloration.[1]

Physical Properties[edit | edit source]

Mars is 6,779 kilometers in diameter and is half the diameter of the Earth, having a surface area only slightly less than the total area of Earth's dry land.[2] The thin air on Mars makes it a dangerous place for humans, as it is mostly poisonous carbon dioxide. You would need a spacesuit to visit Mars. Recently, scientists found lots of frozen water (scientists say water ice) just under the surface of Mars. This means astronauts who may visit Mars in the future will have plenty of water - enough to fill Lake Michigan twice. Mars has a smaller density than Earth, having around 15% of Earth's volume and 11% of the Earth's mass, resulting in Mars's gravity level being about 38% of Earth's surface gravity. The red-orange appearance of Mars's crust is caused by iron(III) oxide, or rust.[3] Occasionally, the surface of Mars can look like butterscotch;[4] but other common surface colors can include golden, brown, tan, and even greenish, depending on the minerals present.[4] The soil on Mars has been found to contain Boron, an element essential for the presence of life.

Comparison: Earth and Mars
Animation (00:40) showing major features of Mars
Video (01:28) showing how three NASA orbiters mapped the gravity field of Mars

Features[edit | edit source]

Olympus Mons may be the second largest volcano in our solar system. It is three times taller than Mt. Everest (the tallest mountain on Earth) at 22 kilometers high and as big as the state of New Mexico. Valles Marineris is a grand canyon longer than the United States of America is as wide. There are also lots of interesting meteor craters and rocks. Sunsets on Mars are also blue in color.

References[edit | edit source]

  1. https://books.google.com/books?id=-WzMCQAAQBAJ&printsec=frontcover1
  2. Cite error: Invalid <ref> tag; no text was provided for refs named nssdc
  3. Cite error: Invalid <ref> tag; no text was provided for refs named rust
  4. 4.0 4.1 NASA – Mars in a Minute: Is Mars Really Red? (Transcript)