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Mars Astronomy Pictures Gallery

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Named for the Roman god of War, Mars probably got this name due to its red color. (Sometimes referred to as the Red Planet.) The month March derives from Mars. Known since prehistoric times, Mars is still a favorite of choice for human exploration.

The density of Mars is about 30 % less than that of Earth (3.94 g/cm3 vs. 5.52 g/cm3). Its core is probably similar to Earth's, mostly iron, with small amounts of nickel, but spacecraft mapping of its gravity field seem to indicate that its iron-rich core and mantle are a smaller portion of its volume than on Earth. Also, its smaller magnetic field than Earth, indicates a solid, rather than liquid core.

Mars' atmosphere is 95 % carbon dioxide, nearly 3 % nitrogen, and nearly 2 % argon with trace quantities of oxygen, carbon monoxide, water vapor, ozone, and other trace gases.

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Pictures of Mars - Frost Covered DunesFrost Covered DunesPictures of Mars - Martian CraterMartian CraterPictures of Mars - View of ChimpView of ChimpPictures of Mars - Western Tithonium Chasma - Ius ChasmaWestern Tithonium Chasma - Ius Chasma
Pictures of Mars - CerberusCerberusPictures of Mars - Wind Action on Martian Sand DunesWind Action on Martian Sand DunesPictures of Mars - West Candor ChasmaWest Candor ChasmaPictures of Mars - Liquid Water on MarsLiquid Water on Mars
Pictures of Mars - Lander 2 SiteLander 2 SitePictures of Mars - View from Lander 1View from Lander 1Pictures of Mars - Lander 1 SiteLander 1 SitePictures of Mars - View from Lander 2View from Lander 2
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