jambaugh said:
I certainly do not agree. Firstly I'm of the opinion that government money spent specifically for the purpose of "raising the quality of life for people here on Earth" has a negative efficiency, i.e. spending money makes things worse...especially in the long term.
That's possible. What I meant was a little more general than just, say, welfare projects though. To take a random example, the money could be used to fund research leading to cheaper power generation, or some other such useful goal.
Investment in technical knowledge never stops giving a return and the builds upon itself. Setting a goal, even if it is a "circus" in your opinion, focuses the effort of development. For example the shuttle program lacked a clear cut goal such as "the best way to service orbital satellites" but was rather a goal unto itself. That is fine for development but not for continued and exclusive use of the shuttle as a launch vehicle.
This is very true. I feel this is especially the case for the space station, so that's a good example of something that is an end in and of itself perhaps more so than anything else. So for the most part I am agreeing with you here, it's just a question of scaling. I.e. how much money do we really want to throw into this as a fraction of the NASA budget?
No there is no specific time and place, there is the time we will reach when we are able to so "wade" and that will occur when we've made the commitment and then developed the techniques. The point when we find out our survival is at stake will likely be far too late to begin such an endeavor. Which means now is as good a time as any to start investing in bringing THAT time closer.
Obviously one does not want to wait until we know that we need to do it to begin this whole process! Ideally, I would like to see it begin once it reaches the financial point where it no longer needs to be so heavily subsidized by the government. To take a concrete example, when things like orbital space flights begin to become profitable for private companies. Of course you need to spend many years and dollars getting the technology to that point. I don't know, maybe it is the case that you just need to focus a lot of attention from an agency like NASA to get there.
Assuming your premise of purpose for the moment, I would say this is a matter of how we have gone about it. We can't really "ease" into human presence in space. I don't think NASA is any longer the bureaucracy to do it and I think the whole shuttle program has been a major waste of time and money.
I agree NASA doesn't have the capability to do it, but what about private companies?
A more efficient approach would be to push forward with the capital investment to create a sustainable manned presence in space, specifically colonization of the moon. That is something we could do now (e.g. self sufficiency w.r.t. food and air within 20 years) for far less than say the welfare budget (which is one of those negative efficiency examples I asserted) and have much more positive effect on the target of that budget by being spent on such a program.
I just flat out disagree. For the initial investment necessary to get a project like that underway, I would much rather have a dozen (or however many) James Webb Space Telescope like projects.
This is true but one example does not prove your point. For example, development of a manned lunar launch facility would dramatically decrease the cost of hundreds of robotic Mars missions. I think the first manned trip to Mars should be for the purpose of colonization and that is indeed some time off in the future...but an indefinite time until we begin progressing towards that goal.
If someone could show me figures saying "Yes, it will cost 1 trillion to put a base on the moon, but given the reduction in costs of launching probes, it will pay for itself within 30 years" I would be right on board with you. The thing is, I don't think anyone could say that. Perhaps I'm wrong, and of course there always is the unknown element to how having a lunar base would reduce costs of current NASA operations and plans.
Practicality is a matter of cost/benefit analysis. The Apollo program has more than paid for itself in spin-off technology and so the "wonder" part is just gravy on the biscuit. As far as progressing the long term practical goal of colonizing space and developing off-Earth resources, it provided major technical knowledge toward that goal. Could we have done it better and more efficiently in hind sight? Almost certainly but that hindsight is itself enlightened by knowledge gained in the very same manned program. I don't find the criticism valid.
There are multiple levels of meta-knowledge which could only be obtained by "just doing it" most importantly of which that it could be done. I find the value of that immense and incomparable to the cost in mere dollars. That is the source of that wonder and awe and why we seek to experience it by such grand endeavors. It is the very very practical return on the investment.
I'll just start off this one by saying that I'm not terribly familiar with the cost/benefit of the Apollo program other than it was costing a significant fraction of our GDP at the time. Also, it seems to me like whichever technologies came out of the program could have been obtained much cheaper without all the bells and whistles of going to the moon (Of course, perhaps you didn't even know about them until you needed them for your rocket, so this criticism is weak). The question of whether or not the Apollo program was worth it monetarily, solely in terms of offspring technologies, is a question of numbers which I don't have so I cannot debate it.
Absolutely it is the case that missions like Apollo give us invaluable experience in how to send humans into space. This experience in and of itself is an immense reward, as it allows us to pursue more complicated projects like permanent space settlements or travel to other worlds. However, this "benefit" can only really be considered as such if manned space exploration is one of our top priorities. I.e. if you have a space agency whose primary goal is to create bigger telescopes, knowledge on how to send men to Mars is useless. I am arguing, and have tried to make a case for, a set of priorities in which manned space exploration is not high on the list, in which case the knowledge and experience gained is not valued much.
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I really want to be able to support manned space exploration, as like I've said before it does strike a very deep chord with me. When I was a bit younger (mind you I'm still only an undergraduate), I made the kind of arguments people have made here for space exploration. Then when I started actually studying physics and astronomy I placed greater and greater value on those missions which could actually yield great scientific results (hubble, voyager, JWST, etc.). So I'd like to be able to say that it is a good use of money, but when I hear about real scientists' research proposals or how telescope X or satellite Y will enhance our knowledge of subject Z, I just find it difficult to compare that with the more abstract benefits of manned space exploration.