I asked the same question of an old engineer at Kennedy Space center who was talking about the Saturn rockets to a (small) group of people (most just wanted take photos and cared little for history). He was quite blunt in his response, "We were doing great but then someone higher up decided that we won the manhood measuring contest and its better to spend public funds on bombing some poor souls in paddy fields half a world away..."
Some examples:
* A telescope on the moon could be larger due to the reduced gravity, and have a better view without the atmosphere.
* Helium-3 mining, not to mention plenty of other resources that are starting to become somewhat scarce and hard to reach on Earth.
* Since the gravity is a 6th of Earth's, launching space exploration vehicles from the Moon would be much easier and thus cheaper.
* Colonizing the Moon would be first step in getting all man's eggs out of one basket, so to speak.
* If man can setup a sustainable ecosystem on the Moon, then he can do so almost anywhere. It really is a great testbed for expanding into the cosmos.
* The Lunar Olympics will be awesome!
I think #5 is the most interesting, but my immediate first question, as a total layman for space travel/survival, is how do we keep breathing up there? It seems like solving the O2 to Moon transport is a reasonable problem to tackle -- assuming we get people and gear up there -- albeit a lot of effort. How about the next outpost? And then the next? Do we continue bunny hopping O2 transports from Moon to Mars to Earth2... etc until there is a continuous supply of breathable air out from Earth? Or do we have a way to generate as we go further? Are we at mercy of Earth's O2 supply? That seems like the biggest problem for leaving this planet.
Is that literally all there is to it -- minus reasonable loss? Does something like that already exist?
> i.e. some plants
Perfect! Do you think that plants can make up the loss from systems that we could set up for converting CO2 back to O2? When can fly some cows and chickens up there? Throwing plants and livestock on the Moon seems too good to be true.
Also, completely off topic, does anybody know the current value per acre of Moon?
Photosynthesis is one such process.
http://curator.jsc.nasa.gov/lunar/lnews/lnmar97/oxygen.htm
The TLDR is most lunar soil plus hydrogen and solar red heat gives a couple percent by mass oxygen in a couple hours.
So solar concentrators "boiling" vats of lunar dirt in the 14 day day, then tanks and nuclear powered LED illuminated plants during the 14 day night.
People don't use much oxygen by mass (although the volume is impressive) so a natural safety strategy is to melt chambers in the base so immense that you can survive a lunar night without any working O2 source. You'll want warehouse space to store "stuff" anyway.
On mars, a worst case scenario means you're a couple years away from the earth's surface (not just O2 or general environmental, but food and disease and sickness) whereas the moon is never more than a couple days from anywhere on earth. That's very convenient. I wonder how many years / decades moonies will "need" 100% lifeboat coverage like that. Eventually it'll make more sense to get self help from a neighboring colony than to abandon ship and fly back to earth.
Although the pressure problem is inverted, IIRC - space has zero pressure outside, whereas the ocean bottom has crush-depth pressure outside.
There's water (almost) everywhere.
Some kind of interferometer with one antenna on the earth and one on the moon would be interesting. Yeah more convenient to launch two satellites into opposite sides of the earth's orbit or something, but this is close enough to have human repair / maint / installation techs at both sides.
One nice feature of a base on the moon is single stage to orbit is technologically challenging on the earth but on the moon its no big deal. Ditto "no biggie" to build a rail launcher for non-living cargos or an elevator for cheap living cargo. In the very long run, there will be people/things in orbit occasionally eating luxury moon produce because it'll be much cheaper to orbit from the surface of the moon than the earth, or the moon will be the breadbasket of space, sorta.
You get 24x7 coverage of half the surface of the earth... I suspect scientists and soldiers will have lots of telescopes pointed at the earth.
Unlike robots or probes if you have humans with enough duct tape onsite, human lunar jobs can be changed in minutes instead of decades for dollars instead of billions of dollars implementing a new mission from scratch. Although never underestimate the ability of mismanagement to screw things up. Just like on the earth surface, doing the same boring predictable thing 24x7 for years unchanged is best done by a robot, and "hold my beer and watch this" or "hmm that result is odd" is best done by a human onsite.
I'm not sure that there are any advantages to placing an optical telescope on the Moon rather than in space.
Having some gravity may be beneficial for the colonists, but AFAIK, 1/6th the gravity wouldn't help much there.
About the only reason for going there instead of into space would be to use materials present on the moon. Of the materials, Helium-3 seems the best candidate, but it is far out, as it would require extensive mining on the moon and transporting it back to earth or space or setting up a huge colony on the moon.
A second reason might be psychological. I think a moon colony, where one could make trips into the 'outback' for a few days, may have advantages for the long-term mental health of colonists (from a space station, people could go on space walks/flights for a few days, too, but such trips would look more like 'going nowhere'.
Space telescopes costs shitloads already, and thats without having to land on the moon.
He-3 mining supposes a technology that doesn't even exist yet - we DON'T have fusion tech.
Launching exploration vehicles from the moon (instead of perhaps in orbit mating) implies an industrial base on the moon. The cost of doing this, especially with tech from the 70s through now is literally astronomical. It's not even a long-term prospect vs quick profit thing. It's not even a "new world" type thing. At least Europeans could enslave an existing labour force in the Americas.
We also can't even setup a sustainable ecosystem on the earth - we probably want to do that first before we try on the moon - see biosphere 2.
I don't want to be a negative nancy, but my point is that in my heart I really want to go to the moon for all these reasons and more. But just calling it a choice of "long term payoff" vs "quick profit" is a brutal over simplification, and also completely sweeps the costs and risks under an idealistic carpet.
Could someone explain this to me? I understand launching a rocket from the Moon would be much easier than from Earth, but don't we need to factor in the cost of getting the fuel to the Moon in the first place? Would there be any benefit over just launching a bigger rocket from earth? In this layman's eyes, it looks like a zero-sum game.
If this is commercially exploitable, this could be cracked into hydrogen and oxygen or otherwise be used as fuel and/or reaction mass, so it would make a huge difference in the economics of going to Mars.
Another thing needed for long-range space travel is radiation shielding, and this can be as simple as a few feet of soil -- something which can certainly be harvested from the moon.
Couldn't a telescope in space be even larger, due to zero gravity?
Suppose we're modifying the James Webb to make it lunar based, wouldn't we need to add additional structural support in order for it to not collapse under lunar gravity? That would drive up the launch mass and thus cost.
1) "Been there, done that - why go back?"
2) The Soviets aren't trying to get there anymore, so the Americans don't see the point of trying.
3) We couldn't even if we wanted to (Apollo equipment is long-since obsolete and unusable, a successor program to return to the moon was scrapped by Obama in 2010).
4) Nobody is keen on spending the billions it would require.
I find it sad that we don't even have the ability to go to the moon anymore, but there you go, I guess that's the way it works when we let our money-saving drive control our curiosity.
Remembers, the millions spent on space exploration are not thrown out of the planet window to literally space! They are spent right here, given to people and making them work.
Instead of having PhD working at McDonalds, (and having less qualified people on unemployment or homeless), you would have PhD working to explore space, and less qualified people working up the jobs PhD don't resign themselves to do.
But there are two more probable reasons:
5) Aliens said: NO.
6) You don't really believe those billions of dollars were wasted on the F-35 program do you? (And all those other waste military development programs, of which we will never know anything about given the ACCOUNTING files have been destroyed in the 911 attack on the Pentagon and WTC-fucking-7). No, all this money has been used in secret space travel and weapon development programs, and they already have interstellar space ships and people going out there.
There are several satellites on the Moon's orbit right now, including US and Chinese ones. Japan had an orbiter, and so did (and will have) India.
PS. Indian Chandrayaan was stuffed to the brim with HD imaging equipment, and yet the only orbit photos of Apollo landing sites are from NASA ... Say all you want, but that's remarkably odd. Who would've passed a chance to grab an image of one of very few monumentally important Moon sites if they were fully equipped to do that and were in immediate vicinity of it.
[1] https://en.wikipedia.org/wiki/Exploration_of_the_Moon#Timeli...
So until the technology exist that makes the planets more accessible I doubt there is a true need to have a base there. Science could benefit by simply being out of atmosphere but money is sucked up in military and social budgets.
It's a fictional story read as a dialogue (Socratic method). It's not stuffy post-modern fiction. Very readable.
http://www.amazon.com/Your-Fathers-Where-Prophets-Forever/dp...
Too much people were needed.
Long:
The Apollo program was built to land a man on the moon as quickly as possible, with a high budget and immature technology.
It was very well designed for its requirements. However it is not the right way to sustain humans in space long term. It cost far too much, in fixed costs and per launch.
Longer:
If you look at old films on how piston powered airlines worked, the amount of staff needed was much larger than the amount of passengers and the trips were short. Hence by definition only few could afford long trips. It's just mathematics. Everybody can't be a lord with servants. Only with modern jetliners the amount of work needed per seat mile dropped drastically, and travel became possible for the masses. Something similar has to happen for space launch. We can't have a significant portion of the population working in rocket factories / refurbishment shops / launch control, so it must be developed and streamlined a lot. In practice this means reusable rockets with high flight rates and low maintenance. Further out, we need to extract resources from space to drastically drop the needed amount to launch from Earth's deep gravity well.
The whole Apollo architecture was a result of immature technology, short time table and large budgets. NASA should not try to repeat it, as the budget and the political drive are not there, and it didn't result in anything long lasting the last time either. Instead, focus should be on lowering cost of more modest missions at first. The Space Shuttle attempted this, but it was too ambitious and inflexible. After they built the mammoth, all the money went into feeding it, and there was no money for developing new things.
"“NASA is an organization that is dominated by fixed costs. In business terms everything is in the overhead,” he said. The committee found, with some effort, that the fixed cost of NASA’s human spaceflight program is $6–7 billion a year. “The bottom line is that they can’t afford to keep the doors open with they money they’ve got, let alone do anything with it.”"
-Jeff Greason, more at: http://www.thespacereview.com/article/1483/1
Even a moderately powered ground-based laser could take out billions of dollars in satellites.
The moon offers a useful strategic location because part of it is always facing away from Earth, making it difficult to attack from Earth-based lasers.
How do we know? Did anyone ever attempt to dig even a few meters below the surface?
But there are other things that are more valuable. On thing is He-3, which would make an ideal fusion fuel. Another is pretty much any raw material, and the industrial base to use it. I'd much rather have industrial machinery churning out tons of pollution on the moon then on the earth.
http://fti.neep.wisc.edu/pdf/wcsar9311-2.pdf
Mind you, if we eventually automate extraction industries the economics for a lot of things change.
> I'd much rather have industrial machinery churning out tons of pollution on the moon then on the earth.
Would you pay twenty times as much for your computer in order to make that happen? And would most people do likewise? It's the answer to that sort of question that determines whether something gets done.