Questions tagged [spacesuits]

Questions regarding the spacesuits that astronauts wear whilst in space

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What space suit is this? [duplicate]

I recently saw this picture, and it puzzles me as to what they are wearing. At first thought, I imagined that they would be space suits. But, they went in a Soyuz craft, and the suits for a Soyuz don'...
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17 votes
2 answers
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What's the normal leakage rate for a space suit?

What's the normal leakage rate for a space suit? For a modern (as in, the model is still in use today) EVA suit in normal condition, undamaged, etc. If there is a wide variation in leak rates for ...
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8 votes
2 answers
583 views

What first aid options do astronauts have during an EVA?

If an astronaut gets unconscious or ill I suppose the colleague will help her to the airlock. But are there any other measures that could be taken already outdoors? Do they have duct tape to seal a ...
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14 votes
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Have any space suits (not) used "pulsed magnetic devices"?

A currently trending question on Skeptics.se references a website that makes the claim that: In Yuri Gagarin’s historic flight to space, he returned in near critical condition after only one hour ...
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1 answer
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How is a space suit climate controlled? [duplicate]

I understand how one could be heated, but how does the space suit cool the water that is noodled throughout it exchanging heat with the body? Why is this method used over traditional methods like a ...
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Flight Suit Pressurization

I'm curious about the pressurization of a full pressure flight suit (such as). For example, the linked suit has an operating pressure of 3.5 psi, but my assumption would be that during normal flight ...
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Is there a standard in spacesuit pressure testing protocol?

Following Elon Musk's and SpaceX's recent announcements of their spacesuits being tested to "double vacuum pressure", there's been some speculation on what this meant. It got me wondering - do NASA, ...
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What does "double vacuum pressure" mean in space-suit testing?

There was news of the new SpaceX space suit in Reddit and now a mention in Elon Musk's Instagram where he says: First picture of SpaceX spacesuit. More in days to follow. Worth noting that this ...
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What is the blue box that the Exp. 53 Astronuats/Cosmonauts carried with them?

Looking at a video from Roscosmos on instagram, Exp. 52 Cosmonaut Sergey Ryazansky carried a blue box with him during his walk to the Soyuz rocket. Upon looking at more videos of Astronauts boarding ...
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9 votes
1 answer
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Apollo Suit sublimation coolers

Should there be a visible steam plume from the Apollo astronauts sublimation cooler in the lunar EVA videos?
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Radiation shield for Mars [duplicate]

Earth's magnetic field on its surface is 25 to 65 microtesla. Besides earth's atmospheric protection, majority of sun's harmful radiation on the earth is shielded by this small magnetic field. Such a ...
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Could astronauts wear EVA suits in the Soyuz?

There's a problem with maintaining the EVA suits on the space station. Since the Shuttle was canceled, only recently has Dragon made it possible to bring the suits down to ground for refurbishment, ...
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How do astronauts deal with micrometeorites during EVA?

There's always micrometeorites in orbit, and they constantly hit the ISS. So my question is during EVA, how do astronauts protect themselves? Is their suit designed to take impact? Since there are ...
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5 votes
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What is the method of joining fabric to the glove and helmet rings in a spacesuit called?

What would you call the method of joining fabric to the glove and helmet rings in a spacesuit by clamping it between two metal rings?
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15 votes
3 answers
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What is the minimum pressure human body can live in, with head protected?

One fundamental problem of spacesuits is stiffnes due to air pressure; at around 0.3atm, with atmosphere of pure oxygen, they grant enough oxygen for breathing, and more than enough pressure to ...
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8 votes
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How did Alexey Leonov bleed off the pressure in his space suit?

On the Voskhod 2 mission, cosmonaut Alexey Leonov performed a spacewalk which ran into issues when Lenov's spacesuit had some sort of pressure buildup. From the wiki - [Leonov] was forced to bleed ...
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-1 votes
1 answer
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Where can I find a good source of information on the material properties of space suit fabrics?

I'm looking for very detailed information. I read journal articles on a regular basis, so don't pull any punches.
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4 votes
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What is the fastest time for donning a space suit?

We have the question Time to prepare for EVA out of ISS that has a good and complete answer about the hours to days long process to prepare for an EVA from the ISS. My question is just about getting ...
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2 votes
1 answer
289 views

Can the ISS's NORS tanks be used to recharge spacesuit or spacecraft oxygen supplies?

In this answer I said: In an emergency a pressurized tank of oxygen gas can be an immediate source of oxygen to pressurize the station, and (possibly) other thinks such as tanks for suits. But for ...
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3 votes
1 answer
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If an ISS emergency requires pressure suits temporarily, can they still use the laptops? Move the cursor?

This answer to the question Which specifications should a tablet computer have in order to work in outer space? points out that capacitive-sensitive touch pads, mouse pads and touch-sensitive screens ...
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4 votes
1 answer
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New Russian Sokol space suit [closed]

According to the pictures of the mission Soyuz MS-03, the crew is wearing a new "Sokol" space suit. The previous crew was still wearing the 1980 "vintage" KV2 version. Any information about this new ...
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1 answer
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Does an astronaut sweat in a space suit?

How effective is the thermal control system and the liquid cooling garment of a space suit? Does it prevent sweating only for a small to medium workload? If an astronaut is sweating behind his ears ...
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3 votes
1 answer
301 views

Buddy Secondary Life Support System (BSLSS) on American suits

Is the Buddy Secondary Life Support System (BSLSS) available in today's American-made spacesuits used on the International Space Station? The BSLSS enables one astronaut to provide life support (...
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9 votes
6 answers
1k views

Will suits worn on Mars lose kilograms of "expendable water" each time they are used?

In this excellent answer to How have space suits dissipated the heat removed from astronauts? I learned that space suits from the Apollo missions and even when used in space walks from the ISS today ...
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2 votes
2 answers
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How Do Astronauts Not Freeze In Space? [duplicate]

I know they have systems that flow water through there suits to keep them cool. But how do they block out the coldness that is space? What materials do they have for this?
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Which consumable resource puts the hard limit on EVA time?

EVA suits use an array of consumable resources: oxygen, CO2 filter, nitrogen, electricity, sublimator/coolant water, drink water, maybe something else I missed. So, if an astronaut on EVA in LEO was ...
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11 votes
1 answer
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How have space suits dissipated the heat removed from astronauts?

I never thought about this until reading the comments below this answer. To radiate something like 150W (a very conservative lower limit of human + suit systems heat production - see @Uwe 's comment ...
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4 votes
1 answer
550 views

Why aren't bubble helmets dangerous in direct sunlight?

I've been thinking lately about bubble helmets used by many cosmonauts and astronauts. Almost every space suit I've seen features a curved helmet, even the Gemini astronauts. But a curved piece of ...
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2 votes
2 answers
377 views

Is a system to remove the charged Mars dust from settlers' suits feasible?

In the question How strong is the electric charge capacity of Martian dust storms? the possibility of electrically-charged dust and its inconvenience or danger to Mars explorers is described. The ...
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4 votes
2 answers
1k views

How (and when) do astronauts suit up when leaving ISS?

I was watching the return of Scott Kelly to earth from the ISS, I noticed that when the crew entered the Soyuz, they didn't wear spacesuits (https://youtu.be/saE0JGtIEKE?t=7m13s) but when they are ...
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8 votes
2 answers
2k views

How did the first US manned Moon mission suits block radiation?

How did the first manned Moon mission spacesuits block the deadly radiation of both Van Allen belts and direct sunlight?
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6 votes
2 answers
866 views

Is space suit using algae for oxygen production possible?

Current space suits carry oxygen bottles for oxygen and some sort of non-regenerative carbon dioxide scrubbers for removing carbon dioxide. This obviously means that a space suit is only able to ...
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13 votes
2 answers
4k views

Why is the EMU space suit pressurized to 4.3 psi specifically?

Wikipedia claims that space suits that use pure oxygen are pressurized to 4.7 psi, instead of 3.0 psi, to account for carbon dioxide and water vapor pressure as per the alveolar gas equation (although ...
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11 votes
2 answers
868 views

Ease of Detachment of a Space Helmet

How easy is it to disconnect and remove the helmet of a space suit? More specifically... How long does it take for one to remove his own helmet? Would it be feasible for somebody to remove another's ...
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78 votes
4 answers
12k views

How do astronauts on EVA deal with nose itching?

It must be absolutely torturous if your nose starts itching and you can't scratch it for several hours, when you're on EVA. How do astronauts deal with it? Are they undergoing a special training, or ...
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12 votes
2 answers
792 views

What are the requirements differences between Escape Suit and EVA Suit?

I read up articles on both types - EVA suits meant for spacewalks, and Escape Suits used in launch and reentry - but other than bright orange color for ACES making it easy to find and the fact that ...
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14 votes
2 answers
750 views

Why use fingers in EVA suits?

I was watching a documentary recently on the development of space suits, both of IVA and EVA. The program made it clear that the most difficult thing was the development of the gloves. The ...
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6 votes
2 answers
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What does the interior of a spacesuit smell like?

What does a new spacesuit and breathing apparatus smell like when you first put it on? The natural progression of the question is does the scent wear off and does it get to smelling stagnant and ...
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4 votes
1 answer
214 views

Communion on the Moon

This article (and some others) confirms "that Buzz Aldrin took communion on the surface of the moon". How is it possible that he ate and drank on the surface of the moon while wearing a space suit?
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23 votes
1 answer
5k views

Do Astronauts lose finger nails in space?

I recently heard that space suit gloves can cause Astronauts to lose their finger nails. We have an answer that includes a link to a 2010 article that says in extreme cases, detach from their ...
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6 votes
1 answer
309 views

Orlan suit inside arm/hand access

I have heard than under some conditions a user of the Orlan EVA Suit can retract his/her arm inside the suit torso, then re-insert arm into suit sleeve and glove (under suit pressure). Can you confirm ...
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5 votes
1 answer
909 views

How can space suit gloves be improved?

Gloves on space suits are hard to use because of their high gas pressure relative to the surrounding vacuum. It's simply strenuous to bend the fingers and astronauts are even said to lose their nails ...
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8 votes
0 answers
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Smart suits in development

This is an offshoot of this question. There's a new generation of space suits coming up (Z-series, anything that the Zvezda NPP has up its sleeves), and I wonder at the level of sophistication of ...
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7 votes
2 answers
703 views

Could you "hose wash" a space suit on the Moon or Mars?

There are some concerns about Lunar dust attaching to the space suits during the Apollo missions. So Suitports are being developed. On Earth, cars get pretty dirty too, but a car wash solves that. ...
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12 votes
1 answer
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How smart is an EMU (...spacesuit)?

What level of circuitry is built into the US EVA spacesuit (EMU)? What is the sophistication of control algorithms used? (PID, discrete logic, $H_\infty$?) Rationale: re-reading Andy Weir's book.
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8 votes
2 answers
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How do the movable-neck space suit helmet works?

Looking at Gemini´s spacesuit G-4C I always wonder how did they make the neck joint able to swivel, allowing the user to look at both directions? Wouldnt be easier to make a slightly bigger helmet (i....
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3 votes
0 answers
474 views

What factors affect the thickness of EVA spacesuits?

Most current extravehicular activity spacesuits are very thick and chunky, like EMU or Orlan. Even though NASA/MIT work on something thinner (Bio Suit), it's not for EVA in vacuum of space, but for ...
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11 votes
3 answers
2k views

Why are the EVA suits in the suitport (concept) exposed to the environment?

I know one of the main advantages of the suitport is to not need an airlock, hence saving a lot of production costs, launch mass, etc. But why are the EVA suits completely exposed to the environment? ...
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17 votes
1 answer
2k views

How much temperature control would an EVA suit on Mars need?

The average surface temperature on Mars is -55°C and it can go down to -130°C. These are temperatures which sound deadly at first. But on the other hand, the atmospheric pressure on Mars is just 0.63% ...
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5 votes
1 answer
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What would happen if you wore 'soft suit'(IVA suit) in the vacuum of space?

I am looking for the effects (mainly in the short term) that you would experience if you were to go on an EVA wearing an IVA suit. For example, I don't think that the IVA suits have any form of ...
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