Bob Zubrin is poo pooing the LCROSS lunar water findings:
While the results obtained from the LCROSS mission are of some scientific interest, it needs to be understood that the amount of water discovered was extremely small. The 30 m crater ejected by the probe contained 10 million kilograms of regolith. Within this ejecta, an estimated 100 kg of water was detected. That represents a proportion of 10 parts per million, which is a lower water concentration than that found in the soil of the driest deserts of the Earth. In contrast, we have found continent sized regions on Mars, which are 600,000 parts per million, or 60% water by weight.
…For the coming age of space exploration, Mars compares to the Moon as North America compared to Greenland in the previous age of maritime exploration. Greenland was closer to Europe, and Europeans reached it first, but it was too barren to sustain substantial permanent settlement. In contrast, North America was a place where a new branch of human civilization could be born. The Moon is a barren island in the ocean of space; Mars is a New World. Mars is where the challenge is, it is where the science is, it is where the future is. That is why Mars should be our goal.
Let’s ignore the fact that NASA disagrees that the moon is drier than earth’s driest deserts, in light of the latest findings. As Michael Turner notes in comments, the problem with that analogy is that there is a huge difference in travel time and expense between the moon and Mars, whereas they were essentially equivalent between Greenland and the rest of North America, in terms of the technology required to get there.
Is there more water, easier to process on Mars than on the moon? Sure, as long as you’re on Mars. Therein lies the rub. This sort of reminds me of the old joke about the guy searching for his car keys in the street at night. Someone walks up and asks if he can help. “Where did you lose them?” “A couple blocks over that way.” “Well, why are you looking here?” “There’s better light.” I say sort of, because it’s not clear what are the keys and what is the light in this analogy.
Anyway, if we can use lunar water to facilitate trips to Mars, isn’t that a desirable goal? Not to Bob, who wants to go Right Now, which would be fine if he were doing it with his own money. He understandably fears that lunar activities will prove a diversion from The One True Goal, in both money and time, as ISS has. But whether or not that would be the case is a function of the reason for the lunar base. If its focus is on utilizing resources (and indeed, if it has a focus, which iSS never did, other than as a jobs program for NASA and later the Russians), there is no need for it to be a diversion — it could in fact be a major stepping stone to not just Mars but the entire solar system. On the other hand, the way that NASA currently plans to get back to the moon (the “Program of Record”) would almost certainly bear out Bob’s worst fears. But the argument shouldn’t be about destinational priorities; it should be about the most cost-effective means of developing the capability to affordably go wherever we want.