Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

esa.int

Post reply on HN
Print view View original

181–190 of 288 posts

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#181

Post by blub »

vl wrote: post #152
Bender wrote: post #133

Earlier quoted context omitted.

The house came with a bacteria that would normally be hard to get rid of. UV, bleach and peroxide took care of it. I just repeat the process to ensure there is no bacteria or mold. This seems to bother people in this thread which I find fascinating. A part of me wants to bring my black light to their dwelling.

I have mold problem in one of the bathrooms. What would be your recommendation? Seal off bathroom and run UV, then vent? Or do I need to do entire house? I can also seal off bathroom and bedroom. Thanks!

No, UV is unrelated to your issue.

First you need to figure out if it’s a surface infestation because of condensation or if it’s a constructive thermal bridge. The latter can be solved by raising the surface (wall, ceiling, etc) temperature through insulation or more inefficiently special heaters designed for this purpose.

In both cases, the contaminated material is removed down to the plaster or masonry. Wood, wallpaper and similar materials will likely be deeply contaminated and must be removed. For areas larger than 1 sq meter, it’s better to get a specialized contractor which will use HEPA vacuum cleaners, special bags, etc to ensure that the mould spores don’t spread in other rooms.

For small areas the agents of choice are bleach or hydrogen peroxide, both available in products for home use.

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#182

Post by deepsun »

stonecharioteer wrote: post #151
ItsClo688 wrote: post #144

Earlier quoted context omitted.

the detail that kills me is moon dust has never contacted oxygen in billions of years, so every time an astronaut came back inside they were essentially doing a chemistry experiment for the first time. the whole moon is just waiting to react with air

This is what trips me up about terraforming. If we learn to create an atmosphere, are we going to instantly poison the oxygen we introduce?

Well, oxygen _is_ poison. It's eager to react (sometimes violently) with almost everything. It rusts and oxidates perfect shiny metals and silicon making everything an oxide!

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#183

Post by mjanx123 »

Bender wrote: post #58
echelon wrote: post #56

Earlier quoted context omitted.

I don't think any of you should want to be smelling Ozone. Diatomic oxygen is already a highly reactive fuel that is killing us and giving us cancer every single day. The ozone species is even more oxidative. Oxygen is how we move about the energy gradient, but it's also killing us. Ozone is worse. "Air purifiers" with ionization are probably not worth the squeeze.

Absolutely. I vent the house after running UV lamps using a 4400 CFM air mover. I leave the house and run errands. I have 3 of these [1] They have a remote control that "arms" them and it starts beeping slow, the faster, then much faster then activates. It kills insects be destroying their lungs and entirely destroys mold, bacteria and even damages viral material. Hospitals run the same lamps in wings that they close…

How long would it take for the ozone to recombine back, if you didn't vent the house?

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#184

Post by altmanaltman »

AngryData wrote: post #113
altmanaltman wrote: post #22

Earlier quoted context omitted.

I mean Neil Armstrong literally smoked and did not "believe" in excercise so they were absolutely not the most physically fittest people. They were just freaks in terms of enduring a lot of stress tests. Physical endurance is just one aspect they train for. Other aspects were much more valued like them being military flight pilots/smart enough to understand the systems/mentally strong enough to not break down etc. Yo…

They didn't select for pure physical fitness but they were already selected for fitness as a pilot and then again when they were selected from the pilots to train as an astonaut. Its not like they just picked arbitrarily from the potential pool of candidates and gambled on getting better than average.

Again, they don't select for pure fitness when it comes to pilots as well. The fact is that you didn't need to be super fit to handle those crafts. Fitness today is much more prioritized because astronauts spend exponentially longer time in space now than they did then and they have to work out in space to keep their bodies from getting used to being in space and zero gravity. They now spends months in space, previously max they would go for is like a week.

So no, pilots or astronauts are not "some of the most physically fittest people in America". They were exceptional human beings but lets be realistic.

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#185

Post by altmanaltman »

spauldo wrote: post #132
altmanaltman wrote: post #22

Earlier quoted context omitted.

I mean Neil Armstrong literally smoked and did not "believe" in excercise so they were absolutely not the most physically fittest people. They were just freaks in terms of enduring a lot of stress tests. Physical endurance is just one aspect they train for. Other aspects were much more valued like them being military flight pilots/smart enough to understand the systems/mentally strong enough to not break down etc. Yo…

Everybody smoked back then. Besides, until you get older your health is much more affected by your lifestyle than whether or not you smoke.

Armstrong literally did not believe in physical excercise though. He thought the human heart had a fixed number of beats and didn't want to "waste" them. Look it up. They guys really did not care about physical fitness back then.

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#186

Post by slow_typist »

FranOntanaya wrote: post #177
ItsClo688 wrote: post #144

Earlier quoted context omitted.

the detail that kills me is moon dust has never contacted oxygen in billions of years, so every time an astronaut came back inside they were essentially doing a chemistry experiment for the first time. the whole moon is just waiting to react with air

Well, sort of. Solar wind does include oxygen ions, so it's exposed to a small extent.

How can it include oxygen?

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#187

Post by vintermann »

dreamcompiler wrote: post #159
genewitch wrote: post #147

Earlier quoted context omitted.

Hi, i am not who you asked, but i feel like i've done enough research and have some warnings. UV-C light itself is antimicrobial, but only for surfaces that the light touches, and in the case of cloth it needs to penetrate a bit. There are at least two types of UV-C light bulbs, as well as literal ozone generators that use ceramic platen and a fan. The type of UV-C bulb that is most common on Amazon and Ali is ~254 n…

> WARNING: Do not be in the room with any UV-C light for more than a few seconds. This advice does not necessarily apply to far UVC (200-235 nm), which appears to be much safer for human skin and corneas than UVC outside this specific band. More research is needed before calling it "safe" but far UVC is almost certainly less hazardous than the rest of the UVC band. Pay close attention to wavelength when purchasing UV…

Yes, this is a common dilemma in air sterilization. Far UV-C isn't as nasty for skin, but it produces ozone, and ozone is nasty and really bad for your respiratory health.

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#188

Post by nvader »

tasoeur wrote: post #153
nvader wrote: post #146

Lunar dust is Kiki while earth dust is bouba.

I’m assuming your comment is a reference to this? https://en.wikipedia.org/wiki/Bouba/kiki_effect

Correct, thanks for linking to context. Kiki/Bouba became something of a meme recently.

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#189

Post by floam »

slow_typist wrote: post #186
FranOntanaya wrote: post #177

Earlier quoted context omitted.

Well, sort of. Solar wind does include oxygen ions, so it's exposed to a small extent.

How can it include oxygen?

Stars make it, our sun is made of it, it’s the third most abundant element.

Distant third

Re: All 12 moonwalkers had "lunar hay fever" from dust smelling like gunpowder (2018)

#190

Post by Groxx »

slow_typist wrote: post #186
FranOntanaya wrote: post #177

Earlier quoted context omitted.

Well, sort of. Solar wind does include oxygen ions, so it's exposed to a small extent.

How can it include oxygen?

Stars kinda famously fuse elements up to iron as part of normal operations. And even if you exclude that, the entire solar system is leftovers from a previous star - all that is inside our current star too. Sure, much of it isn't at the surface, but there's not much of a reason to expect that literally zero of it randomly floats up among the lighter elements.

Have a reference tho: https://en.wikipedia.org/wiki/Solar_wind

Post reply on HN