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f13.net General Forums => General Discussion => Topic started by: Mrbloodworth on November 13, 2009, 12:41:21 PM



Title: Splash! NASA moon strikes found significant water
Post by: Mrbloodworth on November 13, 2009, 12:41:21 PM
Yay! Let the colonization and raping of mineral wealth begin! (http://www.nasa.gov/mission_pages/LCROSS/main/prelim_water_results.html)

EDIT: Changed link to nasa site.


Title: Re: Splash! NASA moon strikes found significant water
Post by: WayAbvPar on November 13, 2009, 12:50:53 PM
(http://4.bp.blogspot.com/_ARTxiBaLfnc/SGTsXqyT54I/AAAAAAAABcM/BpAN6-zkEBA/s400/totalrecall2.jpg)


Title: Re: Splash! NASA moon strikes found significant water
Post by: Sky on November 13, 2009, 01:08:33 PM
Since you started a NASA thread, I'll tuck this in here:

Quote
Museums and libraries are invited to apply for free NASA space shuttle artifacts, including small items such as astronaut helmets, gloves, and boots, and large items such as shuttle Motion Based Simulators and Crew Compartment Trainers. NASA will retire the Space Shuttle Program at the end of 2010 and is eager for the public to learn about the wonders of space exploration through museum and library exhibitions. The Institute of Museum and Library Services (IMLS) is helping NASA reach out to eligible institutions, including museums attended by the public and free libraries serving all residents of a community, district, state, or region. Museums and libraries must first be determined as eligible through the State Agency for Surplus Property in their state. Artifacts, which will be released as they are no longer needed by the Space Shuttle Program, may be viewed by eligible institutions that have been given a log-in and password at the website http://gsaxcess.gov/NASAWel.htm.   
 
The artifacts are offered in batches. For eligible museums and libraries, the current screening period ends November 29. A new batch of artifacts will be made available in January 2010. For the latest information about NASA shuttle transition and artifacts, visit http://www.nasa.gov/transition.

On topic, I'm surprised they didn't pop a rover on the moon to test for the mars projects.


Title: Re: Splash! NASA moon strikes found significant water
Post by: 01101010 on November 13, 2009, 01:27:39 PM
On topic, I'm surprised they didn't pop a rover on the moon to test for the mars projects.

Not cost effective. It would cost nearly as much to pop a rover on the moon as it did for the ones on Mars. At least that is what a buddy of mine told me, he was a subcontractor for NASA out of CMU.

I ask him something similar awhile back - hence my reply.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Venkman on November 13, 2009, 01:31:12 PM
I imagine they figured the primary thing they want out of the moon (a weigh station with usable water) wouldn't be discovered by walking along the surface. So instead they invent this impact solution because that's the experiment they needed for the specific job they had.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Merusk on November 13, 2009, 04:13:52 PM
If you read the comments on several news sites, you'll note a lot of 'fuck you <news agency> where was the front page when India discovered this months ago.' type posts.

So, yeah, world politics is awesome.


Title: Re: Splash! NASA moon strikes found significant water
Post by: caladein on November 13, 2009, 07:22:24 PM
On topic, I'm surprised they didn't pop a rover on the moon to test for the mars projects.

The whole idea behind LCROSS was that another mission had extra room on board so they threw a mission together (by NASA standards) under some strict cost/weight constraints.  For example, the "projectile" used to first impact the moon would have been space junk on a normal mission.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Morat20 on November 13, 2009, 08:39:57 PM
On topic, I'm surprised they didn't pop a rover on the moon to test for the mars projects.

Not cost effective. It would cost nearly as much to pop a rover on the moon as it did for the ones on Mars. At least that is what a buddy of mine told me, he was a subcontractor for NASA out of CMU.

I ask him something similar awhile back - hence my reply.
90% of the cost of ANY mission is getting to low earth orbit. After that, it's just a matter of waiting.

Launch costs dwarf everything.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Lantyssa on November 13, 2009, 09:09:23 PM
I'm curious as to the definition of 'significant'.  They may be qualifying 'detectable' as such, but that doesn't mean it amounts to much.


Title: Re: Splash! NASA moon strikes found significant water
Post by: ghost on November 13, 2009, 10:59:22 PM
I love NASA lately.  Hmmm, there is a potential threat to our funding.  Oh, there are signs of habitable planets all over the universe!  See, there is one!  And another one over there!  And they are covered with water and gold.  And teeming with UFOs.  


Title: Re: Splash! NASA moon strikes found significant water
Post by: Simond on November 14, 2009, 03:47:35 AM
I'm curious as to the definition of 'significant'.  They may be qualifying 'detectable' as such, but that doesn't mean it amounts to much.
http://news.bbc.co.uk/1/hi/sci/tech/8359744.stm
Quote
Scientists who have studied the data now say instruments trained on the impact plume saw copious quantities of water-ice and water vapour.

One researcher described this as the equivalent of "a dozen two-gallon buckets" of water.

"We didn't just find a little bit; we found a significant amount," said Anthony Colaprete, chief scientist for the Lunar Crater Observation and Sensing Satellite (LCROSS) mission.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Tannhauser on November 14, 2009, 04:19:32 AM
God put it there.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Murgos on November 14, 2009, 05:43:01 AM
I'm curious as to the definition of 'significant'.  They may be qualifying 'detectable' as such, but that doesn't mean it amounts to much.
In this case my science to English translator says that significant means that there is enough there to warrant further funding for the project.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Nebu on November 14, 2009, 07:22:53 AM
I love NASA lately.  Hmmm, there is a potential threat to our funding.  Oh, there are signs of habitable planets all over the universe!  See, there is one!  And another one over there!  And they are covered with water and gold.  And teeming with UFOs.  

It's not just NASA.  Every branch of science needs to make their research look attractive to get funding for projects.  Scientists, particularly those not associated with the top 10 universities (Harvard, Cal Tech, MIT, etc) need sensationalism to have any chance at all of getting table scraps.  It's even funnier when you consider that faculty need to get grants just to keep their $50k a year jobs that they studied 10-20 years to get. 

I personally think that this entire project was a monumental waste of money.  Mars is a better investment if you want to do research, but it lacks the instant gratification.  Then again, NASA would probably tell me that my research was a waste of money too  :grin:


Title: Re: Splash! NASA moon strikes found significant water
Post by: Venkman on November 14, 2009, 08:19:37 AM
I think them wanting to find water on the moon is the primary reason they keep trying to look for it :-) It theoretically makes a lot of exploration a lot better if there's a way to establish a base that provides recoup/refill point after you spent so much time trying to get out of LEO.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Nebu on November 14, 2009, 08:27:25 AM
Were it not for the molecular attraction holding the water to the moon dust particles, there would be no water at all.  There's just not enough water on the moon for it to be useful as a base.  If you want to create a non-Earth base, you'll need to do it somewhere where there exists at least a minimal protective atmosphere. 

At least that's how it would seem to me as a nonexpert in astronomy. 


Title: Re: Splash! NASA moon strikes found significant water
Post by: Lantyssa on November 14, 2009, 09:52:49 AM
Agreed.

http://news.bbc.co.uk/1/hi/sci/tech/8359744.stm
Quote
Scientists who have studied the data now say instruments trained on the impact plume saw copious quantities of water-ice and water vapour.

One researcher described this as the equivalent of "a dozen two-gallon buckets" of water.

"We didn't just find a little bit; we found a significant amount," said Anthony Colaprete, chief scientist for the Lunar Crater Observation and Sensing Satellite (LCROSS) mission.
Thank you for the link.  That is the first number I have seen given.  It still does not really answer "how much"?

Twelve gallons out of twelve gallons of ejecta is "Woah!  Moon water for everyone!".  Twelve gallons out of two tons of ejected matter is scientifically important, but not that much quantitatively.

Don't get me wrong, with my background this is exciting stuff.  Even if it was just dirt I would be interested because it would still tell us stuff.  I'm not wanting the hype for the public though, I want to be able to draw conclusions for myself and fantasize about their significance given actual data.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Teleku on November 14, 2009, 01:55:08 PM
I personally think that this entire project was a monumental waste of money.  Mars is a better investment if you want to do research, but it lacks the instant gratification.  Then again, NASA would probably tell me that my research was a waste of money too  :grin:
I disagree, I always thought the obsession with Mars was a waste of time and money.  Mars takes forever to get to and would cost a horrific amount of money just to have somebody walk around for awhile then fly back.  We can't do anything with it (now).  Much better to start trying to setup permanent bases on the moon for research, and use them as launching pads for further exploration.  We can construct and launch things from the moon that we can't from earth.   We can then get to mars and other places much much easier.  Not to mention it would be easier to develop the technology and knowledge base to live on the surface of another planet using the moon as test grounds first.

Not to mention, there is also the potential for Helium-3 (http://en.wikipedia.org/wiki/Helium-3#Extraterrestrial_supplies) extraction from the moon.  Actually, there are several viable commercial and strategic reasons to concentrate everything on the moon.  Mars, not so much.


Title: Re: Splash! NASA moon strikes found significant water
Post by: pxib on November 14, 2009, 03:55:14 PM
There's a lot more reason to concentrate on places like Antarctica, the Canadian and Russian arctics, deep deserts, and shallow portions of the ocean floor that may seem inhospitable but still do not exist in the three Kelvin unshielded radioactive vacuum of space with escape velocity launch costs exceeding thousands of dollars per pound.

I love NASA because it's awesome... and that's all I desire or expect it to be. Beyond geosynchronous orbit it's never been practical.


Title: Re: Splash! NASA moon strikes found significant water
Post by: 01101010 on November 14, 2009, 04:00:13 PM
There's a lot more reason to concentrate on places like Antarctica, the Canadian and Russian arctics, deep deserts, and shallow portions of the ocean floor that may seem inhospitable but still do not exist in the three Kelvin unshielded radioactive vacuum of space with escape velocity launch costs exceeding thousands of dollars per pound.

I love NASA because it's awesome... and that's all I desire or expect it to be. Beyond geosynchronous orbit it's never been practical.

Underwater bases get my vote. Fuck the moon.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Morat20 on November 14, 2009, 04:24:56 PM
I personally think that this entire project was a monumental waste of money.  Mars is a better investment if you want to do research, but it lacks the instant gratification.  Then again, NASA would probably tell me that my research was a waste of money too  :grin:
What? The impact study? It was actually pretty cheap, if I'm remembering correctly. A previously designed moon study had some extra weight in the budget. Engineers took some already "planned to be ejected material" and had it injected at the moon.

In short, they took what was going to be "space junk", used the excess mass budget to crowd in some sensors and eject the junk at the moon, and analyzed that.

It was a really high pay-off mission to boot, since water is so damn useful. You can make fuel out of it, store energy in it (well, in the hydrogen in it), use it to grow things, and just drink the damn stuff. If you've got water, you're good.


Title: Re: Splash! NASA moon strikes found significant water
Post by: pxib on November 14, 2009, 05:53:08 PM
In short, they took what was going to be "space junk", used the excess mass budget to crowd in some sensors and eject the junk at the moon, and analyzed that.
Excess mass budget is the key. The cost per pound of space travel is high because the launch vehicles are expensive... but any rocket you use has a fixed weight capacity, so if you're going to launch one you might as well use every pound. The thing LCROSS threw at the moon was a Centaur (http://en.wikipedia.org/wiki/Centaur_(rocket_stage)) rocket, a popular final stage launch vehicle used to push payloads to high orbits or out of the gravity well entirely. Rather than separating from it as soon as it ran out of fuel, the probe didn't let go until it could swing around and throw it at the moon.

This is the sort of relatively cheap, math and engineering-intensive fun that NASA's been having since Sojourner's airbag landing.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Samwise on November 14, 2009, 06:32:22 PM
Not to mention, there is also the potential for Helium-3 (http://en.wikipedia.org/wiki/Helium-3#Extraterrestrial_supplies) extraction from the moon.

But what happens when the clones catch on?


Title: Re: Splash! NASA moon strikes found significant water
Post by: tazelbain on November 14, 2009, 06:49:17 PM
There's a lot more reason to concentrate on places like Antarctica, the Canadian and Russian arctics, deep deserts, and shallow portions of the ocean floor that may seem inhospitable but still do not exist in the three Kelvin unshielded radioactive vacuum of space with escape velocity launch costs exceeding thousands of dollars per pound.

I love NASA because it's awesome... and that's all I desire or expect it to be. Beyond geosynchronous orbit it's never been practical.

Underwater bases get my vote. Fuck the moon.
We now can build underwater bases on the moon.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Murgos on November 15, 2009, 06:35:18 AM
We now can build underwater bases on the moon.
See?  Now, that's thinking ahead.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Venkman on November 15, 2009, 07:29:05 AM
I'm of a mind that the more we look outward, the more likely we'll find solutions that can apply to our internal issues. This is basically because history has shown the more a culture looks inward, the more likely corruption and complacency prevent any real solutions.

There's only "waste" when an experiment is done and it fails. But you "experiment" and "guaranteed success" are contradictory :-)


Title: Re: Splash! NASA moon strikes found significant water
Post by: Nebu on November 15, 2009, 08:50:27 AM
There's only "waste" when an experiment is done and it fails.

This is a common misconception.  We learn much from failed experiments, often because they fail to produce an expected outcome.  Developing a new hypothesis for why the experiment fails leads, in the best case, to Nobel Prize winning research. 

It is the unexpected that leads us in new directions.  When all of our experiments work, it just demonstrates that our founding theories are solid for that system. 


Title: Re: Splash! NASA moon strikes found significant water
Post by: Venkman on November 15, 2009, 08:56:04 AM
You just made my point for me :-) That's why I put "waste" in quotes. If there was no value in failure, there'd be no science, nor would there be R&D at all as misinformed people look to scale back sunk costs with a low percent of output.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Murgos on November 15, 2009, 09:17:25 AM
It's my personal bias peeking through.  I happen to think that most of the money NASA spends is a waste.  I'd rather focus resources on Earth's problems.  Potable water, renewable energy, food shortages, disease, etc. seem like better investments. 

It's not to say that they don't do good research.  I just question the priority of it all given the problems on Earth. 

NASA's budget is the lowest, as a % of of the federal budget, as it's been since 1960.  It's only ~0.5% of the total federal budget this year.  Think of all the "real science" that gets, at least a little bit, of money from NASA every year and what the cost really is.

Now, think about how in your own experience how hard it is to get funding for "real science", that NASA is probably many scientists best shot at getting pure research funded.  Really, I wouldn't whine about that .5% too much.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Gutboy Barrelhouse on November 15, 2009, 10:29:01 AM
I love NASA lately.  Hmmm, there is a potential threat to our funding.  Oh, there are signs of habitable planets all over the universe!  See, there is one!  And another one over there!  And they are covered with water and gold.  And teeming with UFOs.  

It's not just NASA.  Every branch of science needs to make their research look attractive to get funding for projects.  Scientists, particularly those not associated with the top 10 universities (Harvard, Cal Tech, MIT, etc) need sensationalism to have any chance at all of getting table scraps.  It's even funnier when you consider that faculty need to get grants just to keep their $50k a year jobs that they studied 10-20 years to get. 

I personally think that this entire project was a monumental waste of money.  Mars is a better investment if you want to do research, but it lacks the instant gratification.  Then again, NASA would probably tell me that my research was a waste of money too  :grin:

See, thats why global warming is the hot topic. It's ALWAYS about the funding.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Sir T on November 15, 2009, 11:53:47 AM
AAAND we have a projected retarded politics derail in 5...4...


Title: Re: Splash! NASA moon strikes found significant water
Post by: Gutboy Barrelhouse on November 15, 2009, 12:03:40 PM
I do not want a derail to politics here, but why is the Nebu statement, a blanket statement off the table on global warming? Is there any other science off the table?


Title: Re: Splash! NASA moon strikes found significant water
Post by: Nebu on November 15, 2009, 12:15:53 PM
I deleted those posts.  Keep this out of politics. 

My apologies.


Title: Re: Splash! NASA moon strikes found significant water
Post by: ghost on November 15, 2009, 03:04:43 PM
We now can build underwater bases on the moon.

I smell a Moonraker remake.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Cyrrex on November 16, 2009, 07:00:11 AM
This is all a big cover up.  What is being sold as a bunch of space junk deliberately being plowed into the moon was actually a top sekrit manned mission that has gone horribly, horribly wrong.  They lost control of the craft and slammed into the service, losing all hands.  That 24 gallons of "water" was just their brown water tanks bursting on impact.  Urine and poo.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Venkman on November 16, 2009, 04:46:14 PM
I thought you were going with the moon-as-garbage-dump thing. Then I could ask about the physics behind flinging garbage into the sun Superman IV style.

But noooo...


Title: Re: Splash! NASA moon strikes found significant water
Post by: pxib on November 16, 2009, 07:00:16 PM
The physics works fine. It's easier and cheaper to throw something into the sun than to land the same thing safely on the moon. It's the biggest target in the solar system, and there's no need to worry about space debris after the fact. The actual economics of tossing garbage into the sun at thousands of dollars per pound make investors less eager. REDUCE, REUSE, RECYCLE your nuclear waste. Give a hoot, don't pollute.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Morat20 on November 17, 2009, 12:30:55 AM
The physics works fine. It's easier and cheaper to throw something into the sun than to land the same thing safely on the moon. It's the biggest target in the solar system, and there's no need to worry about space debris after the fact. The actual economics of tossing garbage into the sun at thousands of dollars per pound make investors less eager. REDUCE, REUSE, RECYCLE your nuclear waste. Give a hoot, don't pollute.
It's only easy because you don't even really have to get CLOSE. Just fling it in the general direction of the sun, and it'll end up there sooner or later.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Righ on November 17, 2009, 06:54:25 AM
I disagree, I always thought the obsession with Mars was a waste of time and money.  Mars takes forever to get to and would cost a horrific amount of money just to have somebody walk around for awhile then fly back.

If we don't go to Mars, Adelaide's granddaughter won't go to Proxima Centauri. It's one of those key moments in time that must remain fixed. We have to go.


Title: Re: Splash! NASA moon strikes found significant water
Post by: NowhereMan on November 17, 2009, 08:29:47 AM
 :awesome_for_real:


Title: Re: Splash! NASA moon strikes found significant water
Post by: Sky on November 17, 2009, 09:51:53 AM
I have an easy solution for nuclear waste: Afghanistan.

Only downside is they'd probably invent some new form of anime or something.


Title: Re: Splash! NASA moon strikes found significant water
Post by: pxib on November 17, 2009, 03:08:23 PM
It's easier and cheaper to throw something into the sun than to land the same thing safely on the moon.
Just fling it in the general direction of the sun, and it'll end up there sooner or later.
It's not quite that easy. The sun's almost a million miles across, so you have 32 arcminutes of play even as far away as we are, but you actually want to make sure it's a hit. A near miss will send it into a sharply elliptical orbit and our nuclear waste will keep returning like a tiny, nigh invisible, tail-less comet. We've got more than enough NEOs (http://en.wikipedia.org/wiki/Near-Earth_object) already.

I've got to agree about Mars, though. Men on the moon were a cute way to flex our Cold War muscle, but other than providing a couple crumbly gray rocks for museums... we might as well have stayed home. Mars is a slightly less cold, dead, and dusty ball. It's got air we can't breathe, so the winds will fill the joints in space-suits with sharp chunks of iron oxide and tear the fabric apart. That Mars is the second-most habital planet we know doesn't actually make it worth visiting.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Grimwell on November 17, 2009, 08:33:21 PM
I've got to agree about Mars, though. Men on the moon were a cute way to flex our Cold War muscle, but other than providing a couple crumbly gray rocks for museums... we might as well have stayed home. Mars is a slightly less cold, dead, and dusty ball. It's got air we can't breathe, so the winds will fill the joints in space-suits with sharp chunks of iron oxide and tear the fabric apart. That Mars is the second-most habital planet we know doesn't actually make it worth visiting.
So we should just skip on this whole "Let's figure out how to get to and live on other planets!" thing until we find one that's so totally awesome we just can't believe it?

Sometimes the point of getting there is proving you can.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Bzalthek on November 17, 2009, 11:14:29 PM
Hey, we live in a world that sells us we can have it our way whenever we damn well please and anyone who says otherwise is a commie bastard who hates freedom and kills puppies.  If getting to mars isn't an instantaneous process which allows us to go on vacation there tomorrow and provides free blowjobs, then the average jackass thinks it's worthless.  It's the same shit environmentalism has to deal with.  They can't see anything long term because they'll probably be dead anyway.  As St. Carlin put it  "I got mine! fuck you!"


Title: Re: Splash! NASA moon strikes found significant water
Post by: Sheepherder on November 18, 2009, 03:10:12 AM
we might as well have stayed home. Mars is a slightly less cold, dead, and dusty ball. It's got air we can't breathe, so the winds will fill the joints in space-suits with sharp chunks of iron oxide and tear the fabric apart. That Mars is the second-most habital planet we know doesn't actually make it worth visiting.

Don't forget: a significant portion of the soil is hydrogen peroxide.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Mrbloodworth on November 18, 2009, 05:21:12 AM
Hey, we live in a world that sells us we can have it our way whenever we damn well please and anyone who says otherwise is a commie bastard who hates freedom and kills puppies.  If getting to mars isn't an instantaneous process which allows us to go on vacation there tomorrow and provides free blowjobs, then the average jackass thinks it's worthless.



Title: Re: Splash! NASA moon strikes found significant water
Post by: Murgos on November 18, 2009, 07:16:52 AM

Don't forget: a significant portion of the soil is hydrogen peroxide.

The soil is rocket fuel?

fake edit:
Quote
Dr Houtkooper said, “The GEx experiment measured unexplained rises in oxygen and carbon dioxide levels when incubating samples. If we assume these gases were produced during the breakdown of organic material together with hydrogen peroxide solution, we can calculate the masses needed to produce the volume of gas measured. From that, we can estimate the total biomass in the sample of Martian soil. It comes out at little more than one part per thousand by weight, comparable to what is found in some permafrost in Antarctica. This might be detectable by instruments on the Phoenix lander, which will arrive at Mars in May next year.”

So, not really a significant portion then.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Teleku on November 18, 2009, 08:27:03 AM
I've got to agree about Mars, though. Men on the moon were a cute way to flex our Cold War muscle, but other than providing a couple crumbly gray rocks for museums... we might as well have stayed home. Mars is a slightly less cold, dead, and dusty ball. It's got air we can't breathe, so the winds will fill the joints in space-suits with sharp chunks of iron oxide and tear the fabric apart. That Mars is the second-most habital planet we know doesn't actually make it worth visiting.
So we should just skip on this whole "Let's figure out how to get to and live on other planets!" thing until we find one that's so totally awesome we just can't believe it?

Sometimes the point of getting there is proving you can.
I'm just saying lets learn how to live on the moon first, then work on Mars.  The logistics of getting to Mars makes it so that any mission would just be a glorified photo op, with no actual value.  A shit ton of money to send some guys to walk around and come back.  We can easily supply the moon though, and can much more easily learn how to live there and develop all that technology you mentioned.  Once thats complete, launch off the moon and work at Mars.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Lantyssa on November 18, 2009, 08:56:27 AM
So, not really a significant portion then.
That tells us the biomass is insignificant, not how much hydrogen peroxide there is.  If it were the limiting reagent then Mars' biomass could be much higher and he would be getting excited about that.

At a rate found in Antartica though means any biologically significant molecules present were probably brought there by astroid impacts.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Sheepherder on November 18, 2009, 12:48:57 PM

The soil is rocket fuel?

So, not really a significant portion then.

Not rocket fuel, an oxidizer.  In rocketry it's used to speed the burn rate by drastically increasing the amount of oxygen available to react with the fuel, like Nitrous Oxide is used to increase the burn efficiency of a given volume of gasoline in a car.  As for why it's bad:

Quote
In chemical terms, oxidative stress is a large rise (becoming less negative) in the cellular reduction potential, or a large decrease in the reducing capacity of the cellular redox couples, such as glutathione. The effects of oxidative stress depend upon the size of these changes, with a cell being able to overcome small perturbations and regain its original state. However, more severe oxidative stress can cause cell death and even moderate oxidation can trigger apoptosis, while more intense stresses may cause necrosis.

A particularly destructive aspect of oxidative stress is the production of reactive oxygen species, which include free radicals and peroxides. Some of the less reactive of these species (such as superoxide) can be converted by oxidoreduction reactions with transition metals or other redox cycling compounds (including quinones) into more aggressive radical species that can cause extensive cellular damage. The major portion of long term effects is inflicted by damage on DNA. Most of these oxygen-derived species are produced at a low level by normal aerobic metabolism and the damage they cause to cells is constantly repaired. However, under the severe levels of oxidative stress that cause necrosis, the damage causes ATP depletion, preventing controlled apoptotic death and causing the cell to simply fall apart.

http://en.wikipedia.org/wiki/Oxidative_stress

Then there's the quantity, which Lantyssa explained.  But articles on it snowing peroxide are too good to not link. (http://news.nationalgeographic.com/news/2006/08/060807-mars-snow.html)


Title: Re: Splash! NASA moon strikes found significant water
Post by: Murgos on November 18, 2009, 01:44:26 PM
Hydrogen Peroxide has previously, and is currently still occasionally, been used as a monopropellant in rocket engines so I'm not sure why you take exception to that.

Anyway, I'm not sure why you are trying to make it sound like Mars is made out of H2O2.  Great, some of it comes out of the atmosphere in clumps when exposed to high amounts of static electricity in the martian atmosphere.  It still leaves us with Mars being the second most hospitable planet in the near neighborhood.


Title: Re: Splash! NASA moon strikes found significant water
Post by: pxib on November 18, 2009, 06:19:56 PM
Sometimes the point of getting there is proving you can.
I'm just saying lets learn how to live on the moon first, then work on Mars.
Well sure... if we can figure out how to live sustainably sealed up on the Moon, we can definitely figure out how to do it on Mars. Even less costly would be figuring out how to live sustainably in the nearby vacuum of low Earth orbit (a little tougher without local water, dust, and gravity). Alternatively we could send robots to the Moon (or Mars! or both!) to better determine its sub-surface resources while we put people in another sealed building in the Arizona desert (http://en.wikipedia.org/wiki/Biosphere_2), provide them with analogous supplies to the ones they'd have available on whichever place we'll pretend we've sent them, and see how well they do.

Doing something to prove you can works when you're the USA or USSR in 1960. Not so much in 2010.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Tale on November 18, 2009, 10:51:06 PM
Dark side swimming deserves a quiet night.


Title: Re: Splash! NASA moon strikes found significant water
Post by: Venkman on November 21, 2009, 03:13:16 PM
I've got to agree about Mars, though. Men on the moon were a cute way to flex our Cold War muscle, but other than providing a couple crumbly gray rocks for museums... we might as well have stayed home. Mars is a slightly less cold, dead, and dusty ball. It's got air we can't breathe, so the winds will fill the joints in space-suits with sharp chunks of iron oxide and tear the fabric apart. That Mars is the second-most habital planet we know doesn't actually make it worth visiting.

As mentioned, I'm of a mind that the mission itself (manning Mars) is less important than the discoveries we make along the way about human physiology in artificial environments. Without this desire, there's really no reason to have built anything after whatever space shuttle you need to keep the communications satellites working. The decadence of the average person (as mentioned by Bzalthek) should in no way be used as a crutch by the few people capable of greatness. Or at least, greatening humanity in some small way.