Live data from Hacker News

Astronauts told to return to ISS after sheltering over air leak repairs

bbc.com

131–140 of 283 posts

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#131
post #124

> After multiple inspections and sealant applications, Nasa reported in January that pressure readings suggested a stable configuration had been reached - though there remained uncertainty about whether the leak had truly been sealed or whether air was simply escaping elsewhere. I'm clearly not understanding what they're trying to say here. If _one_ leak was sealed, but the air was "escaping elsewhere", it would stil…

I read it as an inability to measure the leak rate immediately after the repair. If the rate is slow, measuring it takes time.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#132
post #92
post #80

Earlier quoted context omitted.

For every complex, difficult and hard problem, there is a simple, easy and wrong solution. Paint obviously is not the right tool for making seals air tight.

How about glue?

can't one of them just put his thumb in the hole? duhhh

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#133
post #119

Earlier quoted context omitted.

Some style guides distinguish between an acronym (Nasa, say the word as it's written) and initialism (ISS, say each letter)

Yes, including the BBC’s: https://www.bbc.co.uk/newsstyleguide/all#:~:text=our%20style...

That certainly explains it; this particular acronym is even called out distinctly in the style guide.

But "Nasa" still looks weirder to me than "NASA" does.

Like writing "The Scsi bus went Awol" instead of "The SCSI bus went AWOL" also looks weird.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#134
post #12

Earlier quoted context omitted.

There is less debris around on the way to mars and this is a known and worsening for the ISS due to its age.

Debris from what? Satellite debris get in that orbit?

I did an internship at NASA. What they told me is that anything larger than a golf ball they track while anything smaller than, I think they said a penny, is too small to do damage. The problem is debris that's in between the two. In that case they only get a relatively short warning (it's been a while but I think it was on the order of a couple hours).

The ISS can dodge debris by adjusting the height of its orbit.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#135
post #92
post #80

Earlier quoted context omitted.

For every complex, difficult and hard problem, there is a simple, easy and wrong solution. Paint obviously is not the right tool for making seals air tight.

How about glue?

They did use space tape (Kapton) and epoxy for that weird case with the hole drilled in the ISS.

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#136
post #92

Earlier quoted context omitted.

How about glue?

Bubble gum? Like do they chew space bubble gum that they could then smoosh in the holes? In college, we'd use toothpaste for the holes left from nails in the walls we hung up our posters with.

It's time to kick ass and chew bubble gum... and I'm all outta gum

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#137

Earlier quoted context omitted.

Some problems i can see with that: It might be hard to access the actual pressure hull from the inside (there's probably insulation and padding on top) If you use paint, you somehow have to get rid of the solvent in it when it dries, which might be a problem when painting a whole module

Air filtration is one of the hardest things do deal with in space. I don't know what solvents would do, but I remember that astronauts' bone density loss in space means there are challenges around managing the significant amount of calcium captured by the air scrubbers in the ISS.

Wouldn't the calcium go out in your urine?

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#138
post #82
post #45

Earlier quoted context omitted.

What’s the reason against separate conduit for utilities?

They just didn't have enough of reserved general purpose connections for future use. I guess this woild be especially the case with the Russian modules, which were literally surplus Soviet manned space army outposts(such a thing do not make a lot of sense, they did it anyway).

This one

https://en.wikipedia.org/wiki/Salyut_3

had a machine gun!

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#139
post #122
post #77

Earlier quoted context omitted.

If you mean on the outside, paints that apply well in vacuum and microgravity probably need to be developed and tested first. If you mean on the inside, it'd be a lot of time and disruption to devote to maintenance on a station that's already having to spend an increasing amount of time on maintenance instead of science. The modules have a lot of stuff that has been wired between them over the years, all that would n…

> well in vacuum and microgravity probably Wouldn't all paint works well in microgravity? If it didn't, I would think you wouldn't be able to apply it to your floor, walls, and ceiling, with the same paint.

Not OP but I’d imagine the big problem with microgravity is not after application but during application. No idea the scale of that problem but obviously open cans of liquid paint are not realistic (not that anyone was suggesting they were)

Re: Astronauts told to return to ISS after sheltering over air leak repairs

#140

I don’t have a dog in the fight but it’s super scary to think about for the astronauts and their families. This issue’s been going on for a while now. Surprised that there’s not more AI or robotics that could be utilized for such cases. Rumors are that Elon gets spaceX to buy tesla so tele-operated Optimus robots do the hard space work from now on. Not a bad idea per se but I’m not educated on the topic. Curiosity ha…

Elon wants a lot of things that aren't happening.
Post reply on HN