Water on Mars

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File:Water-fraction.jpg
Map of water on Mars.
File:Water ice in crater at Martian north pole.jpg
Water ice in crater at Martian north pole
File:Water-phase.jpg
Graph of temperatures and pressures required to vaporize water.

There is a significant quantity of water on Mars, especially at the poles. Most of the water on the planet appears to be embedded in the soil or below its surface, on most of planet's surface. However, ESA's Mars Express spacecraft had found a patch of water ice sitting on the floor of an unnamed crater near the Martian north pole.

Extraction

For relatively small amounts, surface ice may be brought into a heated habitation to melt. For larger amounts, a temporary habitat may be constructed to raise ambient temperature and pressure slightly so that the water in the soil becomes a gas which can then be collected and condensed.

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