Lunar Dustbusters

Maggie McKee writes "Moon dust could be a source of oxygen and metals. But moon dust could also lodge in astronauts' lungs, possibly triggering long-term health effects. During the relatively short Apollo Moon landing missions nearly 40 years ago, astronauts reported difficulty breathing. So now, before astronauts return to the moon in 2020, NASA is working on a number of ways to reduce the amount of lunar dust astronauts are exposed to — from simple grates on the floor to magnetic wands and giant lint rollers."

Lunar Dust

[Pyrroc]

Why is Lunar dust so different than "normal" dust and/or sand that we breathe and/or eat every day?

Wha.....?

[LordPhantom]

But moon dust could also lodge in astronauts' lungs, possibly triggering long-term health effects.

Possibly? Is there not a consensus that this is likely to cause disease like silicosis?

Re:Lunar Dust

[Jonny do good]

Actually smoking may be benificial here. The dust would tend to stick to the tar rather than scatter freely. Just look at the inside of a computer from a smokers house... the fans a gummed up, sticky dust covers everything and canned air does nothing on the tar laced dust. Mabe the tar can be used to help clean the dust from the air? NASA should give me funding to test this theory :-) Maybe the astronauts shouldn't smoke themselves but a tar derived from smokers homes could be used in air filters or something.

Re:Ask 3M.

[Anonymous Coward]

Actually one of the problems with lunar dust is that it has a charge. Imagine sticking your arm in a box of packaging peanuts and pulling it out and have a number of the peanuts stuck to your arm. It's along that type of concept. The other big issue with lunar dust is that it's very abrasive. I believe in the original lunar missions, when they scooped up lunar dust into containers, it cut the o-rings on the containers that they brought the lunar dust back in.

I am currently involved in an experiment to use a circuit board to remove the lunar dust from solar panels in lunar gravity. If you tried and brushed it off, it would scratch the glass and the solar panels would become less efficient. The circuit has been proven before, but we're (as far as I know) the first ones to try it in lunar gravity. Hopefully this concept can be adapted in the future to create a lunar dust "vacuum cleaner" or maybe apply it to "repel" dust in other ways.

Re:I don't see the problem.

[MichaelSmith]

Breathing hard vaccuum is a really bad idea, so most space suits likely to be worn will be 100% isolated from the outside. This means that the only possible place for dust to get into lungs would be in the landing capsule - if the helmets are removed. Let's say, however, that they are not. That the astronaut simply connects to a piped oxygen supply when in the capsule. Then the risk of contamination is greatly reduced. Not eliminated, but reduced.

You should read the Apollo Lunar Surface Journal [nasa.gov]. Sleeping in the suits was found to be very uncomfortable, even for the short missions (Apollo 11-14). Even then they had to take their helmets off to eat and drink.

Lunar dust is so fine it sticks to everything and gets into everything. Even Armstrong and Aldrin, who were only out for just over two hours, were absolutey covered with the stuff.

The longer missions being planned for the future will need to have a proper airlock area where the crews can strip down to their skin, shower, and only then enter the living area. The airlock would also be used to maintain suit fabric and seals, which are the real problem IMO because the dust is so abrasive.

Re:Wha.....?

[arivanov]

Worse.

Moon dust off the surface has been nicely activated by radiation and sun over centuries. It is not the relatively inert silica you get from cutting glass and rocks. It can catalyse all kinds of strange and wonderfull reactions because cosmic ray particles have kicked out (or even modified) an atom here and there and it has remained there in a very active form due to the lack of atmosphere. On earth it would have been deactivated nearly immediately by oxygen, water or even nitrogen from the air. On the moon it will stay active nearly for ever and over the years there will be more and more of these on the surface of each particle. Add to that the habit to accumulate static charges (which is actually related to the surface being active) so it sticks everywhere and you got yourself a really nasty problem on your hands.

Moon dust is something you do not like having anywhere near lungs and in fact anywhere near the innards of a space station. Think of asbestous, but with nearly instantaneous effect and the habit to cling to everything.

In the 60-es they did not care about health and safety. Nowdays, this would be considerably more difficult to ignore.

Re:Wha.....?

[y00st]

You are probably right. The stuff may be dangerous.

Here is an article [nasa.gov] describing the smell of moon dust..

Re:why not spend 1 billion on asteroid location

[Capt James McCarthy]

"We spend 410 Billion on an unwinnable war where the "liberated", by a majority, hate our guts and now on the real important things it comes down to an either this or that."

Try not to take it so personally. Those folks do not hate you. Hell, I bet they don't even give two shits to what you think. There are always two sides to every decision, those who like it and those who are pissed by it. Just like many leading nations/empires of the past, the US will fall at some point and then you can be pissed at China for having to much control.....if you are allowed to be pissed.

Re:why not spend 1 billion on asteroid location

[saforrest]

You mean the one you bombed the whole country and then tried to see if there were anyone left, or the more recent one, where you invaded the country, and are choosing a new governor that will give a better price for their oil?

You know, the really sad thing here is that those descriptions don't even apply uniquely to Iraq.

Another method as well

[jmichaelg]

Another idea to deal with the dust is to fuse the surface around the habitat. The dust doesn't migrate like it does here on earth because there isn't an atmosphere to waft it. You knock dust loose on the moon, it plummets directly to the ground like a bowling ball. So the idea is to melt the regolith around the habitat so that most of the dust is shed just walking across a paved surface to the habitat. It won't get rid of all the mess, but it'll cut it down.

The Apollo 12 astronauts dealt with the problem in an ad-hoc, but effective, fashion. Gordon, the command module pilot, wouldn't let Bean and Conrad back in until they stripped to buck naked because he didn't want them gunging up their ride home. As they were firing up the engine to leave lunar orbit, one of them joked that if the engine failed, the recovery crew would be wondering why a couple of the astronauts were naked.