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  • There is a lot of water on Mars and there once was a lot of surface flowing water. You

  • don’t see it because most of it is mixed with the soil which we call regolith on Mars.

  • So the Martian soil can be anywhere from as little as one percent in some very dry deserty

  • like areas to as much as 60 percent water. So one strategy for getting water when youre

  • on Mars is to break up the regolith which would take something like a jackhammer because

  • it’s very cold, it’s very frozen. If you can imagine making a frozen brick or a chunk

  • of ice that’s mostly soil and maybe half water and half soil that’s what you would

  • be dealing with. So you need to break this up, put it in an oven. As it heats up it turns

  • to steam. You run it through a distillation tube and you have pure drinking water that

  • comes out the other end. There is a much easier way to get water on Mars. In this country

  • we have developed industrial dehumidifiers. And theyre very simple machines that simply

  • blow the air in a room or a building across a mineral called zeolite. Zeolite is very

  • common on Earth, it’s very common on Mars. And zeolite is kind of like a sponge. It absorbs

  • water like crazy. Takes the humidity right out of the air. Then you squeeze it and out

  • comes the water. And scientists working for NASA at the University of Washington as long

  • ago as in the late 1990s developed a machine called WAVAR that very efficiently sucks water

  • out of the Martian atmosphere. So water is not nearly as significant a problem that it

  • appears to be. We also know from orbiters around Mars and right now there are five satellites

  • orbiting Mars. We know from photographs that these orbiters have taken and geological studies

  • that theyve done that there is frozen ice on the surface of Mars. Now there’s tons

  • of it at the poles. Some of it is overladen with frozenor mixed with frozen carbon

  • dioxide. But in many craters on Mars there apparently are sheets of frozen water. So

  • if early astronauts or early voyagers to Mars were to land near one of those sheets of ice

  • on a crater they would have all the water they need.

There is a lot of water on Mars and there once was a lot of surface flowing water. You

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B1 中級 美國腔

火星上有大量的飲用水。 (There's Plenty of Drinking Water on Mars)

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    elearn 發佈於 2021 年 01 月 14 日
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