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The caps at both poles consist primarily of water ice.
originally posted by: odzeandennz
originally posted by: Kalixi
Very interesting. I didnt even know Mars had water.
Theyll find fossils, its the safest route to disclosure
ice isn't a byproduct of water. water can turn into ice under the right conditions, as can many other elements.
mars and other celestial bodies have many elements in frozen states.
to have water, frozen, vapor, or liquid, you need hydrogen and oxygen, and mars has less than 0.1% oxygen and no hydrogen.
the amount of ice on the surface of mars due to the harsh cold conditions cannot be due to water, because it wouldn't be able to be sustained at 0.1% oxygen on the entire planet for less than an hour.
Hydrogen seems to be leaving the planet's atmosphere in clumps and streams that extend as far as about 10 Mars radii (roughly 34,000 kilometres) into space, said Michael Chaffin, a MAVEN scientist at the University of Colorado Boulder, at a 14 October news briefing. The hydrogen comes from water vapour that breaks apart in the upper atmosphere. And because hydrogen is so much lighter than oxygen, it escapes into space relatively easily. “That’s effectively removing water from the Martian atmosphere,” says Chaffin.
The propulsion system for a human voyage to Mars and back will likely use Nuclear Thermal Propulsion or a chemical engine, and the fuel for both can be liquid hydrogen, produced from hydrogen extracted from the water found on Mars. What's more, reacting hydrogen with carbon dioxide found in the Mars atmosphere would create methane, another promising chemical engine fuel.
The hydrogen detected by DAN is interpreted as water molecules or hydroxyl ions bound within minerals or water absorbed onto minerals in the rocks and soil, to a depth of about 3 feet (1 meter) beneath the rover. The amount of hydrogen is often expressed as "water equivalent hydrogen" based on two hydrogen atoms per molecule of water.