Dr. Anthony Colaprete, LCROSS Principal Investigator, Ames Research Center
- Wednesday, 27 August 2008
The material that’s lifted is not going to be perturbed very much. That’s actually one of the chief requirements that we have on this mission; the booster rocket, the one that hits first, we purge, we clean, we dry out, literally, in space for several months so that it’s very clean and pristine and free from as much contamination as possible. Then we have instruments that actually detect how much of it has either vaporized or heated so that we can understand what portion of our signal or our observations may be contaminated. That’s a consideration we’ve taken into account, but we really don’t think it’s going to amount to more than maybe five-hundredths of a percent of the total material that’s thrown up that will be altered or contaminated by the initial impact.
NTB: Why is finding some trace of water on the Moon so important to NASA?
Dr. Colaprete: It’s important for a couple of reasons. The first reason is it would be a pivotal decision point in our exploration plans. Finding water on the Moon can have great ramifications in terms of how we plan our next steps for going to the Moon and beyond. Water is a fantastic resource. It can be split to make usable oxygen, drinkable water, and probably most important, it can be used to make rocket fuel. It costs a lot of money to bring anything into space; being able to find a resource like water outside of Earth’s gravity provides the potential for mining that water, mining that resource, utilizing it, and becoming more productive on that planetary body.
The Moon is an excellent first step towards, say, Mars, or other bodies beyond in that it’s nearby. We can practice a lot of our techniques for living off the land, for In Situ Resource Utilization, and so on and so forth. Finding water on the Moon will allow us to mature our concepts of engineering and really allow us to build the confidence to live off the land and use other planetary resources.
The other side of the coin, so to speak, is the scientific value. We’re going to a place that has not seen the light of day – sunlight – for maybe 3-billion years, so they’re fantastic time capsules. Any volatiles that may have traveled to the Moon, either in the form of impacts from asteroids and comets, or even just captured solar wind particles, may migrate to these cold traps at the Poles of the Moon and be trapped there for billions of years. Understanding how this material got there and what this material – this hydrogen – is composed of, actually is understanding how our solar system, the Moon/Earth system and just the general interplanetary system itself, was formed and evolved over the last 3 or 4 billion years. So it’s like a time capsule that we can look at and study and use as a laboratory to better understand the formation of Earth.
NTB: In the event you do find water on the Moon, how does NASA plan to extract it and process it in quantities sufficient enough to be of any use?