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Nobody seems to have addressed this problem yet, but it is very important, and I figured I would ask. On mars, would there be problems with heat, like in space, where it builds up because there is nowhere for it to go? Or is it like the polar ice caps (on earth), where you lose heat very quickly, and need heaters and insulators?
If there is a nuclear reactor (there will be if we really want to be economical), then having too little heat isn't that bad, because you could pump some extra air through the reactor (it could be pressurized CO2 from the atmosphere) and use that in a heater. If it's too warm, that's more of a problem, because radiators are heavy and somewhat inefficient.
--I couldn't put just right in the poll option, but that's a little unlikely, so if you think that, just post it I guess--
where is there a design for a rocket fueled w/ h2o2 and a metal? I looked and couldn't find anywhere.
A good way to travel, if there was ever one devised, would be to harvest the power of neutrinoes. If I'm getting my figures right, there are more neutrinos hitting you at night (they come from the sun, if anyone didn't know, if everyone already does, never hurts to reiterate things 8) )than photons during the day. They only interact through the weak force and gravity, so it will be hard to stop them/use some of their energy, butmybe using high concentracions of neutrons. The onlu problem with this is that they decayv into protium (hudrogen 1) after about 15 minutes. Any ideas?
as part of the tenet of ISRU, as well as logistics, it would be better if food (most or all) could be grown on mars. What are some plans to do so for, say, a 4 person crew? Obviously, there should be at least some exposure to the sun, as growing lights are costly in energy and mass terms. Should they be aboveground, or a small shaft with a clear roof?
this is a good paper about food on mars, but how can we do these things?
www.lpi.usra.edu/publications/reports/C … dMars2.pdf
I meant on mars, as part of ISRU ideas. Of course it would be better to use H and O, but I don't think we will have that kind of capacity. For design simplicity of a monopropellant, and the fact that H2O2 is already there, I thought we might use that.
Actually, I was thinking of using it as a monopropellant, for design simplicity.
Although it probably burns w/ most metals, this would add complication that isn't really needed. But doesb anyone know how many kgs of fuel it takes to get 1 kg of fuel from leo to lmo (low martian orbit)
How many kgs of fuel does it take to bring 1 kg of mass to LMO? Also, how much H2O2 is in the average martian soil? Could it be 'harvested' to provide rocket fuel?
I have no real information to add to this topic, but it is very important, so I am posting to have it brought up to the top for more discussion. I agree, however that mars will be highly nuclear.
according to space.com, orbit averages 360 km
it does periodic burns, or else it would have, but my info is from wikipedia as well. Generally this is a bad idea.
I know it would be unpalatable, but couldn't algae be used as food? They would help to generate O2, they might even generate all of the necessary O2, but that isn't the point. They could be engineered (in theory) to collect up nutrients and minerals, and they could have enough calories and everything. They could be grown with more efficiency, and in less space than fruits/vegetables. Obviously, having a dried algae bagel and water with every meal is extreme, but possibly mixing 'algae flakes' in with say, mashed potatoes, would be very helpful to the mission. With vitamin pills, this could provide for everyone's need. Can we eat/drink algae at all? Has this been tested? What do you think?
It seems like you are a big fan of getting something out of the 150 Bn the world has put into the ISS. But about 5 years after it's done, it's orbit will decay, and it will fall back to earth. A shipyard would best be built in L4 or L5, or lunar orbit, to take advantage of the moon's smaller gravity well, and abundant resourses.
about 350 km, stable for about 5 years, according to wikipedia
I think that dark matter is neutrinos
is this possible?
I'm not a physicist.
What's with the idiots who wear the Che Guevera T-Shirts anyway? There are certainly a subset of people who think dictators are cool and who want to take your rights away. After all dictators are only single people, surely the minds of the many can outweight the mind of the one, but we don't see that happening, instead we see the stupid masses jumping through hoops at the behest of the dictator, while he goes about starting wars and initiating violence against the innocent. It boggles the mind how many dim-witted people are willing to blow themselves up for some such dictator, in my opinion such people are second rate and inferior specimens of humanity, and if we can only seperate out this scum, we'd stand a better chance to have a lasting peace.
I can't believe this. This is the ignorance and bigotry that starts wars. People in those countries were conditioned from birth to do whatever anyone tells them to. Of course they will. they are not less human than you. In fact, after your post, it seems as if it may be the other way around. Once they are freed, i whichever manner they are freed, they will have unique views of the world. Not bad ones either. It is hardship that makes us human, and the west has entirely too little of that. la dee da, stuck in our own worlds
(of course they have too much, and are confined to their own world)
Won't it be more or less destined to be high tech if it starts with primarily scientific settlements?
Do you mean take, say, all of the mass in the asteroid belt, and lump it together? I've had the idea. All of the mass in the asteroid belt would be about 1/100th the mass of the earth. You might get moon gravity, which isn't really enough.
I know. And the same goes for that amount of mass, no matter what the size(s). Also, a large part would probably fall on to mars itself, and the moon would probably take a very very very long time to form.
maybe they decide to live on a piece of earth that was knocked off, maybe they build the hab on earth itself, as, even after being hit with a large asteroid, it would be the friendliest of all of the worlds.
firstly, I would just like to point out how we're butting heads all over the place-:D. How big of a moon do you mean? Earth-moon ratio? There's so little benefit for maybe 100 bn dollars. If we want a good base, we could just make phobos or deimos into a space station. To make a decent sized moon around mars, we would need either A) ceres or B) about 1/2 of the non-ceres asteroid belt mass
Sounds like a great beginning. What if they decide to go to your ceres, instead, or somewhere else?
It seems pretty good to me, but as far as I can tell, the people there would either kill them or raise them to supreme overlord.
It seems as if Lschl13 may be some sort of spammer. They seem to need to propose ridiculous things, such as that you need an atmosphere to have gravity, and that mars can be terraformed in about 5 years, my extrapolation from what they said, with 250 kg of water and 50 kg of tree seeds. Don't just delete their account, please, as they may just be mmisguided, but maybe try to get them to see reason, or check their sources a little harder before posting with 'backup from nasa data'
I would like to be a mod... ar some sort of submod, or mod's assistant or official peace keeper or something. I probably havent been here long enough though But that's okay, if there's anything I can do to help, just tell me.
do you mean its orbit? The tilt is fine, I wouldn't mess with it. If it was a large moon (earth to earth moon proportion,) then it eventually might start an aerodynamo. But that wouldn't happen for a million years, if ever, and it would be quite a lot of money for very little profit. People would be more likely just to mine the asteroids of their metals and leave them in the asteroid belt.