Questions tagged [eva]

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

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Can space suit gloves hear, feel, or otherwise sense information through augmentation? Will they?

@mdouglasbibbey's answer describes a situation where it was impossible to "hear" = feel important information while working on Hubble during an EVA, including haptic feedback when a quick ...
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218 views

Are there really “Dead End” signs on the outside of the International Space Station?

This question currently links to the NASA video Expedition 63 Inflight interview with Yahoo Finance KPRC TV - July 24, 2020 at 07:46 where a few seconds later ...
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Specifications on ISS EVA suit cameras

The suits that astronauts use to preform EVA's on the ISS have some sort of "TV camera" with which they stream analog video back to the ISS and then back to Earth so that we can see it on ...
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A Parmitano ‘maneuver’

Referring to the 2013 incident when Italian astronaut Luca Parmitano suffered a leak in his EVA suit causing water to build up dangerously around his face. By the time he was approaching the airlock, ...
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1answer
90 views

Plans for HUD in next-generation spacesuits

A HUD (Head Up Display) allows a computer to display information directly into a user's line of sight and thus allows them to interface with that computer without needing to look at a tablet or ...
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Can an astronaut have a private communication during a spacewalk?

In this NASA page it describes an astronaut remaining in contact during an EVA. While inside these pressurized suits, it's essential that they (the astronauts) remain in constant communication ...
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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 ...
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104 views

Is it possible to create an overridable inflatable airlock seal?

If the information I obtained is correct, inflatable airlocks are sealed by the air pressure and cannot be unlocked unless the pressure is lowered(correct me if I'm wrong). Additionally, airlocks ...
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120 views

Do any spacesuit designs (including prototypes, conceptual, etc) use radiators rather than open-loop cooling?

Answers to: How have space suits dissipated the heat removed from astronauts? explain how USA suits currently use open-loop cooling and do not answer this question! Typically, space suits must ...
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114 views

What are the “25 bespoke tools (that) had to be developed” to install a new coolant system for the Alpha Magnetic Spectrometer (AMS)?

The 2020 Jan/Feb issue of the CERN Courier has an astronaut on its front cover and on the next page From the Editor begins: It’s not often that CERN Courier has the opportunity to feature an ...
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If you fell into a crater on the moon in your spacesuit and no jetpack, is there a way to use low gravity to get out of the hole?

If you fell down a crater or hole on the moon, is there a way to exploit microfravity/low gravity to get to the top? Lets say your survived a fall into Aristarchus crater on the moon with a slow slide ...
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Could moon ice be used to fuel a steam powered jetpack for EVA in space or high altitude exploration on the moon?

For long term moon operations, would it be practical to have a jetpack that used steam as a source for EVA on the moon surface and above it in orbit? I imagine a scenario where lunar ice deposits ...
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150 views

How badly would commodity handheld power tools, with cheap “duct tape” modifications, work in (EVA) space?

Popular articles about the handheld power tools used on EVA by astronauts usually focus substantially on how much specialized engineering goes into making these tools. And there definitely are a lot ...
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299 views

In layman's terms, how hot will the skin of a spacecraft become, 144 million miles from the Sun?

Ok, last week I asked how hot would a piece of metal become at a distance from Earth to Mars facing the Sun. Thank you for all the nice replies, but I do not have much math knowledge. So let me ...
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Can astronauts in currently planned pressure suits survive a cabin which cannot be repressurized?

Imagine the Crew Dragon (or Stariner or Orion) has just achieved orbit. Due to a manufacturing flaw or a meteor, the window suddenly blows out. All 6 of the crew manages to get their suit visor's ...
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SpaceX Crew Dragon depressurization for emergency EVA

As far as I know, the Crew Dragon does not have an airlock. Therefore, if astronauts inside needed to go outside for some reason, they'd need to suit up, depressurize the cabin, and then they'd be ...
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Are deep-space EVAs part of the Artemis plan?

During Apollos 15, 16, and 17, the first deep-space EVAs were performed to retrieve film canisters from the exterior of the vehicle while in translunar space on the way home, producing what is, ...
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Are the Electronic Tools used in the ISS and in the NBL same or different?

Most of the time, we see astronauts carrying electronic tools like power drills during an EVA. They undergo training in the Neutral Buoyancy Lab (NBL) for the same. Are the electronic tools used in ...
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Are the EVA suits used in the ISS and in the NBL same or different?

Are the space suits used in the International Space Station (ISS) and in the Neutral Buoyancy Lab (NBL) same or different? They look similar, but they are used in two different media - one in a vacuum ...
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152 views

Can we create a vacuum inside an EVA suit when the outside is pressurized, will it implode?

EVA suits are specially designed spacecrafts for astronauts during spacewalks. I can say for sure, it can handle the following cases of pressurization of the system: Pressurized inside, but vacuum ...
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What are the Advantages of having a Double-pane Space Helmet?

In the following image of Exploration Extravehicular Mobility Unit (xEMU) or Artemis Generation Space Suit, it can be seen the helmet contains double-pane of glass (inside the black rectangle) What ...
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Does reflected sunlight from the ISS prevent astronauts from seeing the stars during an EVA?

I'm assuming during an EVA when an astronaut is facing the station reflected sunlight reduces an astronaut's dark adapted vision to the point they can no longer see the stars until either the station ...
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How do EVA suits manage water excretion?

This answer immediately sparked the question in my mind of how space suits manage water excretion from the person wearing them. I am aware that the astronauts had to wear diapers since one may need to ...
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631 views

Who put their spacesuit boots on the wrong feet?

Was just reading Mike Massimino's memoir Spaceman and came across this fascinating line: Another time a spacewalker - and this is a true story - accidentally put his right boot on his left foot ...
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Are there any plans for handling people floating away during an EVA?

An EVA carries the risk that objects and people may become detached from the ship/structure and drift away from it. In the case of objects they might become a hazard or their loss might be a problem, ...
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How did Apollo 15's depressurization work?

Artwork depicting the EVA in question, NASA, via wikimedia.org On the way back an EVA was performed, and since there wasn't an airlock, the Command Module was depressurized. Was this feature only ...
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How was the cosmonaut of the Soviet moon mission supposed to get back in the return vehicle?

In the Soviet Moon mission, for which the ill fated N-1 launcher was built, we know that the cosmonaut responsible for landing on the moon was to transfer from the equivalent of the command module to ...
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What is this spacecraft tethered to another spacecraft in LEO (vintage)

In the really nice video Brian Eno on Apollo at 03:40 there is (possibly Apollo-era but not necessarily Apollo) footage of a spacecraft tethered to another ...
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Was any hole in the upper layers of the Apollo suits found caused by a micrometeorite impact?

What about the micrometeorite protection layers of the Apollo suits used for lunar EVA? Was any hole found after landing on Earth?
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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. ...
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1answer
204 views

Is this still a problem with the spacewalk granola bar?

During the Shuttle era, EVA suits had a holder for a granola bar, which gave astronauts something to snack on during long spacewalks. The food bar of compressed fruit, grain, and nuts is wrapped in ...
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181 views

Were there any spacecraft not configured for a spacewalk?

Since the first spacewalks were preformed, have there been any spacecraft that didn't allow for a spacewalk?
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Apollo command module space walk?

Could the Apollo astronauts have done an eva, from the Command Module, during the flight to or from the Moon?
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How many female astronauts have worn the large space suit on a space walk?

The recent all-female spacewalk was canceled because Anne McCain felt the medium sized suit was the correct choice for her for safety reasons, and there weren't enough medium sized suits. Of course, ...
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How frequenty have space walkers been changed based on space suit configuration?

On Friday, March 29, two astronauts were supposed to conduct what would have become the first all female space walk, Christina Koch and Anne McClain. After her first space walk on March 22, Anne ...
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1answer
148 views

Have astronauts lost fingernails on spacewalks before?

Spacewalks can be notoriously taxing on the body - a multi-hour spacewalk is often compared to a marathon in how much the astronaut must exert to overcome the stiffness of the suit. I remember ...
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268 views

Could a pressure suit be used for a short emergency EVA?

What if a docking accident leaves the spacecraft depressurized and unable to re-pressurize. The hatch may be jammed/ punctured or a window blown. In such a scenario, the astronauts would have their ...
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1answer
342 views

Did every shuttle flight after STS-5 carry EMUs onboard?

STS-5 is the first shuttle mission to carry Extravehicular Mobility Units onboard during the Space Shuttle program. Due to various issues happened during STS-5, the first extravehicular activity ...
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215 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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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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336 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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189 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 ...
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1answer
248 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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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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141 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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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 ...
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385 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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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
150 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 ...