DO NOT WANT Poster Girl: There was that depressing statistic about radiation exposure during a Mars flight recently..http://www.cnn.com/2013/05/30/us/mars-radiation/index.html
Heliovdrake: DO NOT WANT Poster Girl: There was that depressing statistic about radiation exposure during a Mars flight recently..http://www.cnn.com/2013/05/30/us/mars-radiation/index.htmlIn flight radiation can be delt with in time, nasa has been working on a magnetic bubble to divert cosmic rays.Also surface radiation on mars turns out to be much less then we had expected. IF I recall correctly it was likened to being about the same is being on the ISS. Which is signifigantly less then we had expected.
deadsanta: Um, because radiation would kill anyone who made that trip, and we're still debating the ethics of even asking for volunteers for that sort of publicly funded program?
Jim_Callahan: The shielding against radiation required to ship living biomass through interplanetary space safely is very expensive, mainly because it's heavy and getting mass out of the gravity well is a big, expensive deal.
xria: If they have fusion in a small device already working, shouldn't they tell the NIF that they can give up on the idea of a huge bank of lasers in a massive building that have only just managed to create a net energy positive fusion reaction (even then only if ignoring the inefficiencies of actually getting all the energy required into the fusion ignition target area).
DarnoKonrad: do we really need to infest another planet?
MuonNeutrino: We're a species of phenomenal idiots who, as a whole, refuse to do anything remotely useful unless you can manage to get our collective overly-fragile egos invested in it.
dittybopper: Jim_Callahan: The shielding against radiation required to ship living biomass through interplanetary space safely is very expensive, mainly because it's heavy and getting mass out of the gravity well is a big, expensive deal.So, the trick is to not bring all the mass required up from the surface of the Earth. That significantly eases the energy costs.
Jim_Callahan: //Water doesn't noticeably shield you from gamma rays, though, and there's not realyl a good source or way to refine lead in space.
Nurglitch: What would people do when they got there? I've heard that worthless rock doesn't even have the Van Allen belts to prevent the people there from being cooked.
real_headhoncho: Someone should make a Kickstarter for this.Crowd-sourced space exploration!
t3knomanser: The problem is that while humans may be better for doing science, they're significantly more expensive. They're needy little bastards which demand things like "air" and "food" and "water".
StopLurkListen: A really fun book for anyone interested in how to keep us meatbags alive in space.[www.stabenow.com image 850x1283]
dittybopper: So, the trick is to not bring all the mass required up from the surface of the Earth. That significantly eases the energy costs.
way south: Because of misplaced priorities.We waste alot of money, even money earmarked for space, because the space race is about political grandstanding and government payouts rather than long term missions and meaningful accomplishments.I think the solution is competition. But short of starting a new war (and the associated penis/rocket comparisons that happen between superpowers) we can't seem to find a willing antagonist to make government do anything worthwhile.Actually, I would go with crowd sourcing too.Gather money and have a private entity go to mars with people, maybe even colonize.Its long past time for government to realize its becoming irrelevant tomankind's future./Maybe if it truly fears that, it will force itself to be relevant and sponsor more science./Or maybe it will destroy the launch facility...
Geotpf: The fact it would cost a trillion dollars or so is one not-so-small issue.
t3knomanser: When it comes to harvesting resources, there's very little out there that we don't have here, and it's far cheaper to mine/manufacture what we need here than it is to fetch it from space. You could park an asteroid made of platinum in LEO and it'd still be cheaper to mine platinum.
Quantum Apostrophe: Because we can't? Who said we "can"?
Eddie Adams from Torrance: dittybopper: So, the trick is to not bring all the mass required up from the surface of the Earth. That significantly eases the energy costs.Bob Zubrin laid out plans back in 1990 for a Mars mission that essentially sent up "factories" ahead of the Astronauts.You can make methane and oxygen on the surface. You just need to bring your own hydrogen.He even built prototypes from off the shelf parts that cost next to nothing.His book "The Case for Mars" is still a pretty good read.
frepnog: Saw Europa Report recently. The film, while sci-fi, is a fairly realistic look at long term space travel, and in the end, they all die due to technical mishaps.
give me doughnuts: Jim_Callahan: //Water doesn't noticeably shield you from gamma rays, though, and there's not realyl a good source or way to refine lead in space.Lead is only 20% to 30% better gamma shielding than the same mass of water or dirt.
CAT-LIKE TYPING DETECTED: frepnog: Saw Europa Report recently. The film, while sci-fi, is a fairly realistic look at long term space travel, and in the end, they all die due to technical mishaps.Well ThankYouSoVERYMuch, Good Sir, for the Spoiler Alert....I had that bookmarked to watch on my upcoming 'weekend' off, due to positive comments in another FARK thread..So much fer that../grumble
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