Questions tagged [spacesuits]

Questions regarding the spacesuits that astronauts wear whilst in space

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10
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1answer
4k views

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 ...
21
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3answers
23k views

Puncturing space suit during EVA. What would happen?

What would happen, if the space suit of a spacewalking crew was punctured during the extravehicular activity (EVA)? What are the chances of this happening? Has this already happened to anyone in the ...
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2answers
891 views

How does the thin gold film in the glass of spacesuit helmets block thermal IR but transmit visible? What's the property?

Comments below this answer suggest that there is a thin gold coating on the glass of spacesuit helmets that blocks thermal IR (say roughly about 10 to 30 microns) but is mostly transparent to visible ...
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2answers
9k views

How would an astronaut's hand react to a hard vacuum?

What would happen if an astronaut took his/her glove off in space but had the rest of their body completely sealed off? My guess is that the hand would start to boil or freeze depending on location.
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6answers
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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 ...
10
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1answer
773 views

What ever happened with that pressure suit design based on elastic tension in contact with skin?

I remember several years ago seeing a pressure suit design based on carefully engineered elastic material in contact with the skin. Instead of pressure on the skin produced by a pressurized gas, the ...
13
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2answers
3k 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 ...
27
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5answers
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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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2answers
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How do ISS astronauts "get their stripes"?

This answer shows two astronauts on a spacewalk outside the ISS. The caption reads: Rick Mastracchio as EV1 (red stripes) and Mike Hopkins as EV2 (no stripes) leaving the airlock during US EVA-24 (...
7
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1answer
984 views

How were Apollo spacesuits cooled during simulations/rehearsals on Earth?

The answer and comments to How have space suits dissipated the heat removed from astronauts? explain that the Apollo space suits used the sublimation of ice into the vacuum of space to constantly ...
78
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4answers
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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 ...
8
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1answer
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Why ISS Astronauts have red stripes?

After seeing the interesting question How do ISS astronauts “get their stripes”?, I was wondering why the color red was chosen for the identifying stripe: I am assuming that red is the best color ...
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2answers
538 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 ...
12
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1answer
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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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1answer
374 views

How to get water inside a space suit?

How is water transferred from outside the suit to inside the suit?
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1answer
541 views

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 ...
2
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1answer
277 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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3answers
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Does Mars space suit have to be pressurized?

Various sci-fi movies treat Mars atmosphere differently, anywhere between "you just need oxygen rebreather" and "Your eyes will pop out and your head will explode". Meanwhile, I haven't seen any solid ...
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8answers
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Would a duct tape spacesuit be practical?

Spoilers ahead for season 2 of For All Mankind. Essentially duct tape wrapped around the body, over clothing which looks like standard NASA jumpsuits for pressurized environments onboard spacecraft. ...
9
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2answers
799 views

What progress has there been in the design of modern spacesuits?

In the early 90's I remember seeing a program where they were discussion new designs in space suits that would be more flexible and allow for less restrictive movements of the occupant. These suits ...
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1answer
12k views

Why do astronauts wear heels?

I was reading another question on the site when I noticed the EVA suit sports heels. Why do they put heels on space suits? (cropped detailed view)
19
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2answers
2k views

Do astronauts on board the ISS have a backup spacesuit?

Do astronauts on the International Space Station have a backup spacesuit with them so that they could use it in case of any malfunction with one of the spacesuits? If so, how many spacesuits does ...
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2answers
2k views

What was the source of the fluid in Luca Parmitano's suit?

There has been a lot of press (example) and commentary about the near drowning in space of Italian astronaut Luca Parmitano on July 16, 2013. We have a question Would the blast clearing technique ...
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1answer
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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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1answer
347 views

Current and near-future space suit odor reduction technology

Fox News' Bill Nye says Mars colonies won't happen: 'Are you guys high?' gives some highlights of science educator Bill Nye (The Science Guy)'s thoughts on Mars, moving there, living in artificial ...
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2answers
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How much protection do space EVA suits offer against radiation for the wearer?

How much protection do space EVA suits offer against radiation? Do they shield certain kinds of radiation more than others? Any idea how many sieverts an individual is exposed to wearing a space ...
2
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1answer
212 views

Can air pressure be accumulated this way for a biodome or spacesuit?

Using plastic or rubber or something similar and transparent be inflated with each layer having a increasing pressure lessening the strain on the containing material? When one or two layers fails the ...
16
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1answer
2k views

What is the power requirement of a spacesuit?

A spacesuit is a fairly easily identifiable piece of equipment in spacecraft. It's purpose is to keep it's interior distinct from the exterior in terms of the pressure, and temperature differentials ...
16
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2answers
1k views

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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1answer
1k views

Did they manufacture six space suits for Apollo astronaut James A. Lovell?

An Apollo astronaut got three space suits, one for training on Earth, one for flight and one as backup. James A. Lovell did fly on Apollo 8 as Command Module pilot and on Apollo 13 as Mission ...
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2answers
766 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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3answers
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How do space suits offer heat protection i.e. during the lunar day?

I didn't know that during lunar day temperature is up to +100°C. This would mean US astronauts were rather to protect against heat than cold? How was this solved (normally, space suits protect from ...
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2answers
580 views

How are Rotating Joints in a Spacesuit Gas-tight?

In Spacesuits, especially in newer ones like the Exploration Extravehicular Mobility Unit (xEMU), there are a large number of rotating joints at different portions like wrists, arms, torso, etc. ...
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0answers
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Why is the Sokol suit white instead of safety orange?

The Sokol is a Russian rescue suit that continues to be used today$^{(1)}$ for launch and landing. It protects the wearer from depressurization, but because it has no micrometeroid and limited ...
17
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1answer
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Is there any reason why American spacesuits color changed over years?

From Mercury silver suits to orange Space Shuttle ones, color of space suits have changed over years. Is there any reason for it?
14
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1answer
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Could an EVA Suit meant for Mars be used for EVA on another celestial, or vice-versa?

A quick follow-up to What is the power requirement of a spacesuit? The Apollo 11 crew were in a vacuum out on Luna; their space-suits fulfilled the purpose of a basic space-suit about which Wikipedia ...
7
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1answer
290 views

How many spacesuits were specifically manufactured for John Young?

John W. Young was a legendary astronaut: The first American in space after the original Mercury Seven, as Gus Grissom's co-pilot in Gemini 3. He got in trouble during this flight for smuggling ...
6
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2answers
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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 ...
6
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3answers
391 views

How much of a drag is it, orbiting the Earth in a space suit?

An astronaut in a spacesuit travels around the Earth at the same altitude as the ISS. Let's say the astronaut leads the ISS by 1000 meters along the same orbit. After one orbit, how much velocity has ...
4
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1answer
733 views

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 ...
4
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2answers
153 views

Non-biological end effectors (hands) in spacesuit design

Designing the 'end effectors' or gloves of a spacesuit is notoriously difficult. Hands have are extremely flexible and are the primary interface that humans use to interact physically with the world. ...
2
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1answer
2k views

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 ...
2
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1answer
167 views

How will space suit computers likely be radiation hardened?

Writing this comment inspired the following question: Space suits are critical to life, so if there's a solar storm and the astronaut has received a less-than-lethal dose of radiation, they'll be ...
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4answers
305 views

How far are space-walking helmet faceplates from the eyes? How far will I have to hold my "space binoculars" from my eyes during a space walk?

I'm on a space walk and comet Kohoutek is passing by and I've brought my specially designed space binoculars with me to look at it. I left my Nikon Monarch 8x42 binoculars inside because with an eye ...
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5answers
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How possible are 'space jumps'?

Have you seen the first of the two new Star Trek movies? Kirk (Chris Pine), Sulu (John Cho) and a red shirt perform something really awesome in this film: They jump from space down to a planet, ...
14
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1answer
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Do space suits measure "methane" levels or other biological gases?

A comment below Was “I have the farts, again” broadcast from the Moon to the whole world? links to this humorous video clip of the 1997 comedy movie RocketMan about astronauts on Mars. Personnel on ...
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1answer
1k views

How did they test early spacesuits in a vacuum?

Early spacesuits (like the SK-1 or the Mark IV) were designed before anyone had gone into space. How did they test that the suits would perform well in a vacuum? Did they send them into space with ...
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2answers
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Time to prepare for EVA out of ISS

How much time is needed to an astronaut on ISS to prepare herself for an EVA? Is this time so much different from time needed during Apollo missions?
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1answer
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What sounds do astronauts hear inside their helmets during an EVA?

Besides the communications over the headsets, do astronauts hear any other sounds inside their helmets? Do they hear their own breath? Are there any mechanical sounds audible? Does the circulating ...
15
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3answers
3k views

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 ...