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NASA Probes Reveal Vast Stores of Martian Ice
John Faughnan writes: "The BBC reports that a British newspaper has leaked stunning news from the Mars Odyssey spacecraft. Vast amounts of water ice are present on mars, "[if it] were to melt it could cover the planet in an ocean at least 500 metres deep." Researchers thought it would take a year to detect any water ice below the martian surface, but the huge quantity meant that weeks of observation were sufficient. The BBC notes that "The Mars Polar Lander was to touch down in exactly the right spot in 1999 and would have undoubtedly detected the ice had it not malfunctioned on the way down." This discovery will change plans for upcoming probes and may lead to a manned mission within the next two decades. The official announcement was scheduled for this Thursday prior to several publications."
They don't have to take water with them. It costs $10,000/pound to put something in orbit. One gallon of water will cost about $80k to put up there. So, there's a weight and cost savings using local water. Plus, they should be able to use the water to generate hydrogen and oxygen, for fuel and survival.
Napster-to-go says "Fill and refill your compatible MP3 player", which is a lie. It's not MP3. It's WMA with DRM.
Having ice on mars solves two major problems with shipping human beings to mars, and even creating a settlement there.
First, now we only need to ship enough water to keep them alive for the trip there, thus saving an incredible amount of energy.
Second, which is not so obvious. We only need to send enough oxygen for the trip there. Why? Well, ice is water, water is H2O
2 parts Hydrogen, 1 part Oxygen.
You can chemically seperate the oxygen from the hydrogen using electricity, which is easily generated by either solar collectors and/or a nuclear powerplant. Thus, they can not only drink, but breathe when they get to Mars.
This is an absolutely amazing finding (if it is true), since now it will become considerably cheaper to send people to Mars. Also, it might even become more feasible to leave them there with a colony then to send them back.
~ kjrose
The care needs to be taken in the other direction. Water means that Earth life can live there--for instance, bacteria of the Antarctic sort. If we want to know about Martian indigenous life, we need to not inadvertently release several hundred species of microbes on the planet, some of which might take hold and crowd out any existing forms.
Even if they didn't adapt and live, sorting out their chemical components from those of native forms would complicate research.
Sterilizing an entire spacecraft is no easy job in the first place, and it gets much more difficult when the contents include live human beings.
This is great news if there is water on Mars but i believe one of the major stumbling blocks on a manned mission to Mars and sustaining him isn't so much water
but getting people there alive.
Astronauts just on the journey (180 days each way + 550 days for return journey planetary alignment) would be exposed to lethal doses of radiation meaning when they got to Mars they would already be too ill and poisoned to be of any use to science let alone come home, i don't really feel that comfortable in sending (volunteers) to die a horrible slow death from radiation sickness under the guise of "research"
NASA have did do some research in 1998 on using dirt for shielding on any base but this doesnt answer the journey time radiation exposure problem
I think we forget in our own insignificance that the ISS and the shuttle fly close enough to the Earth's magnetic field and our atmostphere to be protected from the worst effects of our Sun (radiation,flares,magnetic bursts,uv, etc) but once we leave for Mars we will be exposed to the Suns full destructivness and we still havent developed protective materials/shields (short of 6ft thick lead) that will protect us long enough not to kill us in the 915 day exposure of such a mission.
I am still suprised that we think we can send people there after water when so far all we have sent is a glorified "remote control car" instead of an advanced humanoid type robots like this into space
Many people are neglecting the fact that Mars does not have the gravitational strength to hold oxygen in it's atmosphere. Melt the ice, it will eventually vaporize and then escape the planet.
In all likelihood they were just trying to convey just how much water there is. If they simply stated that there is evidence of at least XX billion gallons of water, that would mean very little to most people, so they chose to convey the amount of water in the context of the size of the planet, to make it more comprehensible.
:-)
Quite sensible, really
You do have a point, but a valid counterpoint would be that the research required to attempt to terraform Mars may have a significant positive impact in our ability to modify our own atmosphere.
We've only been terraforming one planet (albeit for the worse) for a few hundred years. We need more data so we can understand exactly how we're damaging our own world. CO2, O3 are only two variables in a larger and likely mostly unknown equation...
Then we could terraform Mars and Earth at the same time.
I understand you're talking more generally, and this goes back to the "invest at home, not pie in the sky" debate. I'll leave that for another thread...
It absolutely DOES have the gravitational strength to hold oxygen in the atmosphere. The red planet has a gravitational force of 0.32, which is more than strong enough to hold light gases near itself. The problem is that it will take much *more* oxygen and nitrogen to create a breatheable atmosphere, as the lower gravity means the atmosphere will be much taller, or higher above the surface.