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Questions tagged [eva]

Questions regarding extra-vehicular activity, or EVA, during space exploration.

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60 views

How Is The Quest Joint Airlock Operated?

I have searched and searched and cant seem to find any media whatsoever that explains or outlines exactly how the airlock is operated. What exactly is the process you go through to open it, do you ...
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0answers
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Did the Apollo astronauts hear any external sounds during a lunar EVA?

Did any sounds resonate through their boots or any part of their environmental suit? Could they hear the folding or rubbing of the material of their suits? Did anything impact their boots that might ...
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1answer
257 views

Rescue of untethered astronaut or cosmonaut at ISS

If an astronaut or cosmonaut at the ISS becomes separated and floats away accidentally during an EVA, is there a way to rescue him or her?
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1answer
78 views

Were shuttle and ISS spacewalks always done with two astronauts?

Even if only one astronaut is needed for an EVA, it makes sense to have a second suited up and outside in case of an emergency. Was there ever any exception to this number (e.g. 1 or 3) for the space ...
3
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1answer
71 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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0answers
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Can astronauts on an EVA communicate directly with ground stations?

Can astronauts/cosmonauts performing spacewalks at the International Space Station communicate directly with radio stations on the ground (even if only as a back-up)? Or do they need to relay their ...
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0answers
101 views

Had Apollo astronauts practiced getting up from a fall?

The question "Could an Apollo astronaut stand up if they fell on the moon?" describes several incidents of Apollo astronauts falling over while on the moon, and their attempts to get back up. Did the ...
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Did the Apollo astronauts do any EVAs in mid-flight? [duplicate]

For example on their way to the Moon, did the astronauts also leave the Apollo CSM during their flight? Or did they go outside only on the Moon? Were or could there have been any EVAs in mid-flight of ...
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3answers
18k views

Could an Apollo astronaut stand up if they fell on the moon?

I was watching old Apollo footage and noted how astronauts on the moon had a very particular gait most likely due to the poor flexibility of the EVA suits, low gravity, and need for safety. I was ...
6
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1answer
183 views

Zero gravity spacewalk above low Earth orbit?

There have been a lot of spacewalks in LEO and there have been moonwalks too. Voskhod, Gemini, Soyuz, Apollo, Skylab, Mir, Space Shuttle and ISS. But what about EVAs above LEO and below the orbit of ...
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143 views

Were there ever any accidents involving cold-welding on EVA?

I recall there were cases of mechanisms of spacecraft that failed due to cold-welding, but are there any records of accidental cold-welding on EVA? of e.g. an ill-prepared tool cold-welding to a part ...
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1answer
120 views

High velocity particle impact on humans in outer space

The Earth is constantly bombarded by matter from space. Is there any risk of high velocity dust particle/micro-object (cosmic garbage e.g.) impact on astronauts while in outer space? What chance is ...
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What is the purpose of this cable connecting Astronaut's boot restraint to a robotic arm?

The caption for the image ISS016-E-008937 says ISS016-E-008937 (3 Nov. 2007) --- While anchored to a foot restraint on the end of the Orbiter Boom Sensor System (OBSS), astronaut Scott Parazynski, ...
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1answer
184 views

Can modern EVA spacesuit be put on/taken off by single person, without assistance?

Watching TV streams of NASA spacewalks I note that at least one extra crew member helps two spacewalkers before their excursion and after it. Can modern EVA spacesuit be put on/taken off by single ...
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1answer
229 views

Have astronauts gotten sick on EVA?

In lots of science fiction, people have EVA suits which automatically preform First Aid or administer temporary medical help (such as painkiller injections) so that they can get themselves to a safe, ...
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3answers
302 views

How bright is starlight in deep space?

Say I'm way out in deep space and on EVA. If I turn off all sources of illumination, can I basically still see, or am I severely impaired by darkness? Of course I can still see the stars, but will ...
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2answers
391 views

Was this large pieces of “space junk” just released from the ISS in the “nadir and retrograde” direction?

According to Space.com's 02-Feb-2018 article Cosmonauts Break Russian Spacewalk Record During Space Station Antenna Repair: The cosmonauts spent the day replacing an electronics box for a high-gain ...
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1answer
204 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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64 views

What is this NASA Spaceflight article trying to explain?

The NASA Spaceflight article Extended Russian EVA complete – conducts satellite deployments contains a very long discussion about the timing of the CRS-12 launch. Had it missed the "single shot launch ...
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1answer
1k views

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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1answer
2k views

Why is this astronaut placing a radar reflector?

In this video we can see an astronaut on the payload bay of the Space Shuttle, placing what looks like a radar reflector, during an EVA. The following image is a frame from the video in question: ...
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3answers
705 views

What dangers are astronauts exposed to when facing the sun?

In this live stream, we have an astronaut facing the sun (we've seen his hands actually): I thought people doing an EVA should avoid the sun at all cost, but here he's facing it. From what kind of ...
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139 views

Why are crew EVA cuff checklists wrapped in Kapton tape?

As seen in this image below, the cuff checklists have Kapton tape wrapped around their edges. What is the reason for this?
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1answer
561 views

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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1answer
463 views

Can astronauts inside ISS hear their crewmates doing EVAs?

I was just watching a video of two astronauts doing an EVA on ISS to install some things. As I saw how they moved around the outside of the ISS using handrails and other things to grab, I was ...
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1answer
119 views

How many people can go on a spacewalk?

According to the lists of spacewalks (1965-1999, 2000-2014), spacewalks have all consisted of only two people. The only exceptions are the very early space missions, where only one person went out, ...
7
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1answer
433 views

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
269 views

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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3answers
877 views

Why did moon dust not cause problems on Apollo during the return flight from the Moon?

The Apollo Command Module and the LEM were built in clean rooms free of dust on earth and yet (knowing that they didn't have air locks on either module) the astronauts came in directly from the moon ...
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1answer
2k views

Spatial screwdriver

I watched the Kimbrough and Whitson's EVA on 01/06. And I'm wondering why astronauts use custom screwdriver and not the usual ones (like Makita or Dewalt, for example) ? http://image.prntscr.com/...
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What do astronauts do if they feel like itching during space-walk? [duplicate]

Astronauts need to regularly go out of ISS for the purpose of maintenance and repair. What happens if they start feeling itching inside the spacesuit? Do they have to go back inside? Do they use any ...
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4answers
4k views

The Loose Astronaut

A common point of drama in science fiction is the loss of a tether during a spacewalk threatening to (or actually causing) send an unlucky astronaut hurtling into space. In reality, is such a thing ...
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Average cost of SpaceWalk [duplicate]

How much does it costs NASA for an astronaut to perform a single spacewalk? Not including salary just the cost of actually sending someone into space.
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1answer
173 views

Has there been any program to develop tiny pod-like vehicles with manipulator arms for extra-vehicular activities?

Remember the pressurized repair / assembly pods from 2001 A Space Odyssey and so many other space visionary works? Has there been any programs to design & build tiny vehicles like that with ...
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1answer
242 views

ISS Repair/Maintenance Tools

Are the tools like the driver and the bolts on the ISS magnetized to prevent losing them when doing repair/maintenance? Is there a special way to prevent it other than magnets?
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1answer
68 views

Work done on spacewalks

What do most of the jobs done on spacewalks consist of? Changing small pieces on the ISS? Unbolting/unplugging a piece and putting the new one in?
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5answers
1k views

Has any living thing been directly exposed to the vacuum of space

In our several decades of spaceflight have we ever exposed any living organism to space? I'm pretty sure this hasn't happened to Humans, but have we jettisoned some lab rats into space ("for science") ...
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1answer
837 views

Cost of an EVA on the ISS?

What does it cost for an astronaut to spend an hour outside the ISS, in terms of astronaut time mission preparation time ground support personnel space suit "rent" (?) Does this cost vary for a ...
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1answer
623 views

Why are the ISS' Sequential Shunt Units not on the inside?

Recently Tim Peake and Tim Kopra carried out an EVA to replace a failed Sequential Shunt Unit, some form of electrical regulator for the solar panels, on the outside of the ISS. Why aren't these ...
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1answer
245 views

What would it be like to walk on the Asteroid 216 Kleopatra?

Here is some renditions of 216 Kleopatra. Kleopatra is a relatively large asteroid, measuring 217 × 94 × 81 km.Calculations from its radar albedo and the orbits of its moons show it to be a ...
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1answer
77 views

Why were these spacewalks so short?

I got lost down the wiki hole and ended up reading a page on Sergei Avdeyev when I noticed that he has 2 very short spacewalks listed: MIR EO-20 – 8 December 1995 – 0 hours, 37 minutes MIR EO-...
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4answers
10k 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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2answers
4k views

How long does it take to get from a spacewalk to being inside the ISS and out of your suit in an emergency?

I just saw a show that featured an incident in which an astronaut on a spacewalk to install the Canada 2 arm on the ISS was temporarily blinded by contaminated water inside his helmet. His colleague ...
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2answers
302 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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5answers
1k views

Why won't JWST deploy in LEO where it is potentially serviceable?

The James Webb Space Telescope will deploy (unfold mechanically) while on the way to L2. Couldn't it do so in LEO, where it is potentially serviceable? Starliner CST-100 and Dragon are planned to soon ...
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2answers
7k views

How did the Apollo astronauts change film in their cameras?

Part of Apollo astronaut training was learning to be a pretty good photographer without a viewfinder. The Hasselblad 500EL Data Camera used magazines with 160 color/200 B&W exposures on 70mm film. ...
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1answer
232 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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0answers
685 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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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 ...
4
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1answer
300 views

Can Orion (or Dragon or CST-100) be upgraded to do multiple EVA's (space walks)?

Orion is designed to support only one EVA. There's no airlock so the entire spacecraft would be evacuated of air during the space walk and then repressurized from gas flasks, with a storage enough for ...