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To explore the solar system beyond our planet, one important factor is the ability to locate water which can be used for drinking and for creating rocket fuel. To assist in the hunt for water on neighboring Mars, NASA has released a “treasure map” of potential ice locations on the red planet.

Researchers created the map of the Martian surface which shows where water ice (so-called because other chemical compounds can freeze) is believed to be located. In some places, the ice is as little as 2.5 centimeters below the surface, making it easily accessible to future visitors. Cool colors represent ice closer to the surface, while warm colors are ice deeper down.

You wouldn’t need a backhoe to dig up this ice. You could use a shovel,” the paper’s lead author, Sylvain Piqueux of NASA’s Jet Propulsion Laboratory, said in a blog post. “We’re continuing to collect data on buried ice on Mars, zeroing in on the best places for astronauts to land.”

Locating reserves of ice is important to enable manned missions to the planet, and could help identify sites for projects like spaceX Mars base. Water is heavy to transport aboard rockets, so finding it on Mars could help humans survive there. However, because the planet has such a thin atmosphere, most water on the surface evaporates quickly.

We’ve known for a while that there’s water on Mars in the form of ice. In 2008, NASA’s Mars Phoenix lander discover frozen water in a soil sample after landing on the planet a month earlier.

Looking below the Martian surface provides the best hope of finding accessible water ice, and that there may even be liquid water beneath the polar ice cap. With this new map, researchers have a blueprint for where to start planning missions and eventually sending astronauts to Mars.

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